US20050096660A1 - Compression bone staple, apparatus and method - Google Patents
Compression bone staple, apparatus and method Download PDFInfo
- Publication number
- US20050096660A1 US20050096660A1 US10/896,360 US89636004A US2005096660A1 US 20050096660 A1 US20050096660 A1 US 20050096660A1 US 89636004 A US89636004 A US 89636004A US 2005096660 A1 US2005096660 A1 US 2005096660A1
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- staple
- legs
- applicator
- tensioned
- bone
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 65
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000006835 compression Effects 0.000 title claims abstract description 21
- 238000007906 compression Methods 0.000 title claims abstract description 21
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- 230000007480 spreading Effects 0.000 abstract description 7
- 208000010392 Bone Fractures Diseases 0.000 description 6
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- 229910052751 metal Inorganic materials 0.000 description 4
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- 238000007596 consolidation process Methods 0.000 description 3
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- 239000000463 material Substances 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 208000002847 Surgical Wound Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
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- 239000007943 implant Substances 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/064—Surgical staples, i.e. penetrating the tissue
- A61B17/0642—Surgical staples, i.e. penetrating the tissue for bones, e.g. for osteosynthesis or connecting tendon to bone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/0682—Surgical staplers, e.g. containing multiple staples or clamps for applying U-shaped staples or clamps, e.g. without a forming anvil
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/122—Clamps or clips, e.g. for the umbilical cord
- A61B17/1227—Spring clips
Definitions
- the present invention relates to devices and techniques for securing bone segments across a fracture site, and more particularly relates to a bone stapling method and apparatus for achieving compression between segments.
- fixation has been accomplished by variety of apparatus and techniques, the more common involving the use of metallic fastening devices such as screws, connector plates (secured to the bone by screws), pins and clips. These methods invariably involve the drilling of screw holes in the bone and the use of related equipment such as drill hole templates.
- the disclosed “compression” clip is essentially a clip with opposing legs that are installed in pre-drilled holes and features a crimpable web that joins the top ends of the legs.
- a crimping tool is used to crimp the web in an effort to set up compression between the embedded legs.
- U.S. Pat. No. 4,852,558 also requires manual installation of separate legs in pre-drilled holes, the tops of the install legs then being interconnected with a ratchet mechanism which must be operated to draw the legs together. This design appears inherently limited regarding adjustability and maintenance of constant pressure.
- U.S. Pat. No. 5,660,188 the two legs of a clip must also be installed in pre-drilled holes.
- the clip has a bridge of two side-by-side crimpable elements, and the jaws of a crimping tool must be used on the embedded clip to deformingly spread apart these elements, causing the legs to draw to each other.
- the foregoing techniques involving crimpable clips all appear to be imprecise in setting up suitable compressive forces, require hole drilling and related problems, and do not lend themselves to minimizing the size of the surgical opening.
- a more particular object is to provide quick and simple, yet effective method for fastening bone segments with compressive force between opposing bone ends.
- Another object to provide such a method that minimizes the size of the required surgical opening and associated trauma.
- a further object to provide a method of bone stapling that minimizes trauma to the bone tissue during implantation of the staple legs.
- Yet another object is to provide a method for stapling that maximizes the capability of establishing a dynamic compression level that is optimal for enhanced osseous healing.
- a still further object is to provide simple, effective bone fixation technique that is relatively easy to learn and practice.
- Another object is to provide for compression fixation in applications where other techniques would not work or would not deliver compression.
- conventional fastening techniques for handling a “Jones” fracture i.e. one that is transverse to the longitudinal extent of the bone segment, is difficult to address using conventional fastening techniques, however the present invention is particularly suitable to provide fastening for such fractures.
- Still another object is to provide stapling apparatus and method in which there is enhanced selection capability regarding the level of the compressive forces to be imparted.
- a bone stapling method and apparatus that uses a generally U-shaped staple having pair of spaced apart legs with sharp free ends and proximal ends interconnected by bridge that has at least one resilient curved portion, whereby spreading apart of the parallel legs lessens the curvature of the curved portions which brings the staple to a tensioned configuration in which one leg is resiliently urged towards the other.
- the bridge portion comprises a single bowed spring element, the curvature of which lies in a plane normal to the axes of the staple legs.
- the novel fastening method involves first positioning the fractured ends of a first and a second bone segment in proximate, face-to-face relationship.
- the next step involves spreading apart the staple legs by a certain amount and holding the staple in the resultant tensioned configuration.
- the extent to which the staple legs are separated can be varied in one preferred embodiment of the invention, the induced compressive forces between the legs being proportional to the amount of displacement of the legs as the bowed portion is moved through range of motion in which elastic behavior is exhibited.
- herein lies one of the advantages of the present invention, i.e. the capability of selecting the optimal compressive force for an application by spreading apart the staple legs by a predetermined amount.
- the staple is held in its tensioned configuration, it is positioned with it sharp ends forward and aligned respectively with surfaces of one bone segments and the other.
- the positioned staple while maintained in its tensioned configuration, is driven into the bone by percussive force, such quick application being provided by a conventional air-powered striker of a stapler according to the present invention, or by a manually stuck staple applicator according to the invention.
- the embedded staple legs will cause the opposing bone faces to be pressed into each other with a predetermined amount of force.
- apparatus include a staple applicator having within its housing means for supporting the staple and guiding its movement with legs pointed ends forwardly disposed, and adapted to receive the staple in its initial untensioned configuration engaging its legs and spreading them apart by certain amount and holding the staple in its tensioned configuration adjacent the front end of the housing, for ejection therefrom.
- a staple applicator having within its housing means for supporting the staple and guiding its movement with legs pointed ends forwardly disposed, and adapted to receive the staple in its initial untensioned configuration engaging its legs and spreading them apart by certain amount and holding the staple in its tensioned configuration adjacent the front end of the housing, for ejection therefrom.
- One embodiment uses opposing first and second grooves for engaging the staple legs and means for adjustably moving one groove from the other.
- Another embodiment employs grooves that diverge to spread the staple legs as a staple is advanced there-along.
- Ejection means mounted for longitudinal movement in the housing has a front end adapted to strike the rear of the tensioned staple with percussive force
- the invention also includes a staple applicator that is adapted for being manually driven.
- Another related bone stapling method for compressively securing adjoining bone segments uses a resilient metallic staple that has legs with an initial convergent configuration with respect to each other, and the legs are resiliently extendible into parallel relationship, in which configuration a predetermined amount of spring force will urge the legs towards their initial convergent orientation.
- This method includes holding the normally convergent staple in its legs-parallel configuration, positioning the so-tensioned staple with its sharp ends aligned respectively with adjacent bone surfaces; and then driving and embedding the legs of the tensioned staple in the bone segments and releasing the embedded staple, whereby the bone segments are joined, and opposing surfaces of the bone segments are caused to be pressed into engagement with each other with a certain amount of compressive force.
- An applicator or tool for such a staple includes staple-engaging means on the front end of the applicator body.
- Opposing jaws support the staple in a pointed-ends forward position against lateral and rearward movement, and engage inside surfaces of the convergent legs, the jaws being adapted for adjustable movement apart to cause the legs to rotate to a generally parallel orientation.
- the staple can be aligned with the bone segments, and the rear end of the tool stuck with a percussive force to cause the staple legs to be embedded into the bone segments.
- Another applicator has a trigger-controlled air-powered staple-driving mechanism, and has a staple feeding mechanism including ramp means that is shaped to receive and support a staple in its initial configuration on one end of said ramp means, the configuration of the ramp means gradually changing to a shape that will hold the staple with its legs generally parallel with each other.
- the staple can be slidably pushed along the ramp means in a lateral direction, i.e. normal to the plane in which the staple legs and bridge portion lie, to bring it to a terminal position along the ramp means, in which position the rear of the tensioned staple can be struck by the front end of a powered striker.
- FIG. 1 is perspective view of a preferred embodiment of a compression staple according to the present invention
- FIG. 2 is top plan view of the embodiment of the staple of FIG. 1 ;
- FIG. 3 is a rear end elevational view of the staple of FIG. 1 ;
- FIG. 4 is a perspective view of variant of a staple according to the present invention.
- FIG. 5 is an elevational view of staple applicator according to the present invention, with parts broken away for the sake of clarity;
- FIG. 6 is a partial, perspective enlarged view of the front end of the staple applicator of FIG. 5 ;
- FIG. 7 is a sectional view taken long the line 7 - 7 of FIG. 6 ;
- FIG. 8 is sectional view taken long the line 8 - 8 of FIG. 6 ;
- FIG. 9 is an enlarged, partial perspective view of the front portion of a variant of a staple applicator according to the present invention.
- FIG. 10 is an enlarged, partial perspective view of the front portion of another variant of a staple applicator according to the present invention.
- FIG. 11 is a top plan view of a manually powered stapler according to the present invention.
- FIG. 12 is a partial, enlarged perspective view of the front portion of the staple applicator of FIG. 11 ;
- FIG. 13 is a sectional view taken along the line 13 - 13 of FIG. 12 ;
- FIG. 14 is a perspective view of another variant of a compressive staple according to the present invention, wherein the staple legs have a convergent orientation with respect to each other;
- FIG. 15 is a side elevational view of the staple of FIG. 14 ;
- FIG. 16 is a top plan view of a staple applicator according to the present invention.
- FIG. 17 is an enlarged, partial perspective view of the front end of the applicator of FIG. 16 ;
- FIG. 18 is an enlarged partial, side elevational, partially sectional view illustrating the mounting of a staple on the front end of the staple applicator of FIG. 16 ;
- FIG. 19 is a view similar to FIG. 18 showing a staple supported with legs parallel;
- FIG. 20 is a perspective view of a convergent-legged staple that is adapted to be fed to a powered staple applicator;
- FIG. 21 is a rear elevational view of the staple of FIG. 20 ;
- FIG. 22 is a side elevational view of another powered applicator according to the invention.
- FIG. 23 is a perspective illustration showing means for feeding staples to the staple-driving means of the powered staple applicator shown in FIG. 22 ;
- FIG. 24 is a partial, enlarged, partial sectional side view of staple-delivering ramp member of the applicator shown in FIG. 22 ;
- FIG. 25 is a schematic illustration of the staple-striking region of the staple feeding means of FIG. 23 ;
- FIG. 26 is a perspective view of another variant of another compression staple similar to the staple of FIG. 1 , and adapted for use with a staple-feeding magazine or cartridge;
- FIG. 27 is a front end elevational view of the staple of FIG. 26 ;
- FIG. 28 is a partial sectional perspective view, with parts broken away for the sake of clarity, illustrating a magazine or cartridge for feeding the staple of FIG. 26 to a powered staple applicator.
- FIGS. 1-3 show that a preferred embodiment of a compression staple 11 according to the present invention has a pair of legs 13 with sharp front ends 15 and a bridge 17 that interconnects the rear end portions of legs 13 .
- Staple 11 is fabricated of a surgical grade, bio-compatible metal, such as stainless steel, titanium alloy or other suitable alloy.
- Bridge 17 functions not only to hold legs 13 in approximate parallel relationship, but is selected to act as a spring by the flexing of its bow when the legs are spread apart as illustrated by the broken line image of FIGS. 2 and 3 . This imparts an inward reacting force between the legs proportional to the degree of their displacement. It will be appreciated that the dimensions, gauge and curvature of bridge 17 are selected such that it can be flexed to a tensioned state that will deliver the compression requirements of the bone fixation to which staple 11 is to be applied.
- legs 13 are provided with serrations or barbs 19 .
- serrations or barbs 19 the size of such serrations or barbs can be advantageously minimized, which minimizes trauma to the bone tissue during their implantation.
- FIG. 4 shows a variant 23 of a staple according to the present invention, having legs 25 . It is formed from metal rod having suitable strength and spring properties. It is also contemplated under the invention that the curvature of the bridge can take other forms than the single bow shown, and would include, among others a generally V-shape and a shape with double 90 degree bends.
- FIG. 5 shows an air-powered staple applicator 29 for applying staple 11 , and it includes main body 31 , a conventional air piston assembly 33 within body 31 , air supply line 35 and a pistol grip and trigger assembly 37 for holding the stapler and for controlling the air-powered operation of the staple head 41 , to be described hereinafter.
- the staple head 41 features an adjustable staple mount 43 that includes lower head 45 which is a forward extension of body 31 , and upper head 47 .
- a pair of parallel guide rods 51 affixed to lower head 45 and extending upwardly therefrom, slidably engage twin bores 53 in the upper head 47 so as to guide the upper head in vertical motion relative to the lower head 45 .
- a screw jack assembly drives the upper head and includes thrust screw 55 that engages the threaded bore 57 in lower head 45 .
- FIG. 7 best illustrates the screw jack assembly and shows turn knob 59 that has a socket for receiving a tool such as an Allen wrench for rotating the knob 59 .
- FIGS. 6 and 7 also show a longitudinally extending groove 65 on the lower head 45 and a corresponding parallel groove 63 on the movable upper head 47 , these grooves being shaped to cradle the opposing sides of staple legs 13 , and the knob can be operated to set the spacing between grooves to allow staple 11 , in its initial un-tensioned configuration, to be mounted thereon as illustrated.
- vertically extending gradations are provided at 67 on a forward surface of body 31 , adjacent the movable rear end of upper head 45 , so as to gauge the displacement of the staple legs when the invention is operated in a manner to be described below.
- staple applicator 29 includes mechanism for driving a staple forwardly from the staple head 41 , and includes longitudinally extending striker member 69 that is slidably mounted to grooves 71 and 73 for longitudinal movement, and the rear portion (not shown), is connected to the air piston assembly, and spring means (not shown) will hold the striker in an initial rearward position as illustrated in FIG. 6 .
- Striker member 69 has front surface 75 that is adapted, as best shown in FIG. 7 , to impact the rear legs of the staple bridge 17 when the striker member 69 is propelled to its forward position shown by the phantom lines in FIG. 6 .
- a staple 11 is mounted to the staple mount 43 which is operated to bring the staple to the desired tensioned configuration. Then bone segments are brought together by manual or mechanical manipulation as close as possible and aligned with each other.
- the stapler head 41 can then be positioned with its legs straddling the fracture line, and sharp ends 15 adjacent the surfaces of the bone segments.
- the stapler trigger can then be operated to cause the striker to drive the legs of the tensioned staple into the bone segments.
- FIG. 9 shows ends 79 and 80 that are adapted to strike respectively the upper and lower rear ends of staple legs 13 , of a staple 11 supported in tensioned configuration. It is contemplated under the invention that strikers like striker 69 a , with differently spaced ends 79 and 80 can be provided so that different sized staples can be accommodated.
- FIG. 10 shows the forward portion 81 of another variant of a power stapler applicator according to the present invention, having a main body 82 , an upper staple guide 83 and lower staple guide 85 .
- Opposing forward portions 87 of the guides are separated by a distance allowing it to hold staple 11 in tensioned configuration, and the rearward portions 89 will hold the staple in its initial configuration.
- the open-sided portions 91 allow a staple to be loaded by hand unto the staple guides.
- the divergent portions 93 will cause the spreading apart of the staple legs, and thus a tensioned staple is positioned for ejection.
- a striker member 95 has upper and lower edges 97 and 99 slidably engagedin slots 101 and 103 so as to mount the striker member for longitudinal movement.
- the striker front ends 105 and 107 will align with and abut the rear ends of a tensioned staple.
- FIGS. 11, 12 and 13 show a variant 113 of the invention, whereby percussive force is delivered by hand using a suitable mallet.
- the body 115 has a rear portion 117 designed for being struck by a mallet, and staple holder 119 at its front end.
- FIGS. 12 and 13 show how the holder 119 includes lower portion 121 that has staple leg-receivinggroove 129 , and an adjustable upper part 135 with groove 137 .
- FIG. 12 best shows how a dove-tail portion 141 of part 135 fits in a complementary slot for guiding vertical movement of part 135 .
- Front surfaces 145 and 147 respectively of parts 121 and 135 are adapted to abut the rear ends of a staple mounted in grooves 137 and 129 .
- a screw 153 for driving the part 135 has threads 157 that engage a threaded bore 159 in the movable part 135 , and the knob 163 can be engaged by a suitable tool to rotate the screw
- the sharp ends of a tensioned staple 11 can advantageously be precisely positioned on the target spots on the bone segments, then the tool end 117 struck with a mallet to implant the staple.
- FIGS. 14 and 15 there is shown in FIG. 14 another compressive staple 161 according to the invention that is fabricated of a suitable resilient metal, and features legs 163 and 165 that converge with respect to each other, and interconnect by a bridge 167 .
- Staple 161 can also be made of a suitable resilient non-metallic bio-absorbable material.
- FIG. 15 best shows how legs 163 and 165 each converge at a pre-selected angle ⁇ , with respect to parallel positions that the legs can be resiliently urged in a manner to be described hereinafter. It should be apparent that the material properties of the selected resilient material, the degree of convergence, and the dimensions and form of the staple will be selected by those with ordinary skill in the pertinent art so as to establish a certain force by which the parallel legs are urged to their convergent positions.
- FIG. 16 shows one preferred embodiment of a bone-staple applicator 171 having a main body 173 with a rear end 175 adapted for being impacted by a force delivering instrument like a mallet.
- the front end 177 is designed to mount a staple 161 in its initial configuration and then move it to, and hold it in, a configuration where its legs are parallel.
- front end 177 has an upper jaw 181 that can be adjustably spaced from to a lower jaw 183 using drive-screw mechanism similar to that used for the screw-driven spreadable parts 135 and 121 previously described above and shown in FIGS. 12 and 13 .
- FIG. 16 shows one preferred embodiment of a bone-staple applicator 171 having a main body 173 with a rear end 175 adapted for being impacted by a force delivering instrument like a mallet.
- the front end 177 is designed to mount a staple 161 in its initial configuration and then move it to, and hold it in, a configuration where its legs are parallel.
- FIG. 17 shows how the upper jaw 181 , and lower jaw 183 are shaped to mount a staple 161 , the slots 187 and 189 in the respective jaws being sized to receive the staple bridge 167 .
- a recessed portion 191 in the top of thee jaw 181 is for supporting and stabilizing rearward portions of the upper staple leg 163 , and there is a similarly recessed portion on the under-surface of the lower jaw 183 (not shown) for supporting the rearward part 196 of lower staple leg 165 .
- the recessed portion 191 has a shelf 193 for engaging lower surfaces of leg 163 , and opposing edges 195 can hold the staple against lateral movement while the ledge 197 is adapted to abut the rear edge of the staple leg.
- FIG. 18 best shows how an untensioned staple 161 is first mounted within the grasp of the opposing recessed portions of the jaws 181 and 183 , and it is noted how surfaces 193 and 194 engage inner surfaces 211 and 213 of opposing legs 163 and 165 . It should be appreciated how the screw mechanism 217 can be operated to move apart the opposing jaws, causing the opposing legs to be pushed into parallel relationship, as illustrated in FIG. 19 . When a staple 161 is thusly mounted on the applicator tool 171 , it can be used much the same as the previously described device 113 , to apply a tensioned staple 161 to adjoining bone segments. Note that the jaw surfaces 193 and 194 can be appropriately sloped to ensure that the legs will be pushed into parallelism.
- FIGS. 20 and 21 show another embodiment of a compression staple according to the present invention, i.e. the staple 261 which is particularly adapted for application by a powered applicator, for example an electrically powered or an air-powered staple applicator such as applicator 271 shown in FIG. 22 , to be described.
- the staple 261 is fabricated of a suitable resilient metal using conventional metal-working techniques.
- the staple legs 263 and 265 extend from the bridge portion 267 and converge at a predetermined angle. It is noted how legs 263 and 265 are wider than the bridge portion 267 .
- the inside surfaces of the staple bridge and legs are adapted to slidably engage staple-feeding ramp structure, to be described. Furthermore, FIG.
- FIG. 21 best shows how this staple structure provides to one side of the bridge 267 , opposing inside surfaces 270 and 274 respectively of legs 263 and 265 , which can be advantageously engaged for slidable forward movement of the staple along parallel guide surfaces in the powered staple applicator 271 , in a manner to be described.
- the trigger-controlled applicator 271 shown in FIG. 22 , except for its forward end, is similar to the above-described applicator 29 , and includes a piston assembly 275 .
- FIG. 23 illustrates how at the forward end of the applicator 271 , there is mounted a staple feeder 273 designed to supply and position staples for engagement by the front end 279 of a striker 281 that is connected to the piston assembly 275 .
- FIG. 23 shows that the feeder 273 includes a housing 285 that is attached to a sidewall of the applicator and which supports a ramp member 287 that has a distal end 289 that is shaped to receive staples 261 .
- the walls 291 , 292 and 293 are shaped so as to be slidably embraced by a number of staples 261 in their relaxed, legs-convergent configurations.
- FIG. 24 also illustrates the ramp member 287 and shows how the ramp walls 291 and 292 vary from a convergent orientation at one ramp end to a generally parallel one at the opposite ramp end 294 .
- FIG. 23 also illustrates that within the feeder housing 285 there is a spring-powered pusher 295 , connected to a suitable conventional spring (not shown) for urging the pusher 295 against the rear side edges of a staple 261 mounted on the ramp member 287 .
- a spring-powered pusher 295 connected to a suitable conventional spring (not shown) for urging the pusher 295 against the rear side edges of a staple 261 mounted on the ramp member 287 .
- FIG. 25 shows how the innermost end of the ramp member 287 has an end 299 that is spaced from a guiding surface 301 of applicator wall 304 .
- Surfaces 301 and the opposing upper and lower surfaces 303 and 305 form a channel as FIG. 24 shows, for receiving the striker 281 .
- FIG. 25 shows in broken lines a tensioned staple 261 in position for being driven by the striker 281 .
- the bridge member 267 is spaced within the above-mentioned channel, clear of the end of the ramp member 287 , the staple being supported by virtue of the staple leg surfaces 270 and 274 ( FIG. 21 ) engaging the ramp member.
- the striker front end 279 is aligned with the rear end of staple bridge portion 267 .
- applicator 271 In operation of applicator 271 it is supported with its front end in close proximity to the relevant bone segments, and with the pointed ends of the staple appropriately aligned therewith. Pulling the trigger will cause the striker end 279 to impact the staple bridge and propel the staple forwardly as the staple legs are held generally parallel by sliding engagement with the generally parallel surfaces of the ramp member 287 during ejection.
- the striker will have a stroke sufficient to cause the legs, in their parallel configuration, to be embedded in the bone tissue.
- the striker will return to its initial position rearward of the ramp member. Then spring force will cause another staple to be positioned in the ejection channel.
- FIGS. 22 and 23 show the feeder 273 connected adjacent the front end 260 of the applicator, it should be appreciated that in some cases it is desirable that the feeder 273 attaches to the applicator 271 at a location spaced a greater distance to the rear of the front 260 . In such cases the ramp walls 291 and 292 in the region of wall 301 are elongated forwardly as necessary to provide guide surfaces for the staple, and the stroke of the striker 281 is increased accordingly.
- FIGS. 26 and 27 illustrate yet another variant 361 of the compression staple 11 described above ( FIG. 1 ), and has generally parallel legs 363 and 365 and resilient bridge 367 .
- This configuration provides opposing surfaces 370 and 374 , best shown in FIG. 27 , that are adapted to engage parallel guide surfaces when the staple 361 is propelled from a powered staple applicator 371 ; to be described.
- FIG. 27 the tensioned configuration of staple 361 in shown in broken lines.
- FIG. 28 shows a feeder 373 which is constructed similarly to the above-described feeder 273 , except that the ramp member 387 is adapted to handle the staple 361 .
- the ramp walls 391 and 392 provide parallel surfaces for engaginginside surfaces of the staple legs and the wall 393 slidably abuts the wall 393 .
- the distal end of the ramp 387 receives staples 361 in their untensioned condition, and the walls 391 and 392 gradually diverge from each other such that at the other end 395 of the ramp, a staple 361 will be supported in a legs-parallel tensioned configuration.
- a spring-powered pusher 399 is adapted to urge a number of nested staples 361 towards the end 395 of the ramp.
- the ramp end 395 is spaced a predetermined distance from the guide surface 401 and provides surfaces that engage the opposing surfaces 370 and 374 of staple 361 .
- the ramp end 395 can be struck by the striker 397 and ejected from the applicator.
Abstract
A method and apparatus for interosseous bone fixation uses a compression staple, generally U-shaped, having a pair of legs with sharp front ends and proximal ends interconnect by a bridge portion that is resilient and bowed, the staple having an initial configuration and capable of a tensioned configuration by spreading apart the legs by a certain amount causing the curvature of the bowed bridge to lessen and the legs urged towards each other with certain compressive spring force. A staple applicator supports and guides the staple and positions the tensioned staple with its pointed ends forward, adjacent an ejection port at the front of the applicator. A powered strike member is mounted for longitudinal movement and has a front end that will strike the rear of the tensioned staple with percussive force and eject it in tensioned configuration from the applicator.
Description
- 1. Field of the Invention
- The present invention relates to devices and techniques for securing bone segments across a fracture site, and more particularly relates to a bone stapling method and apparatus for achieving compression between segments.
- 2. Description of the Prior Art
- In treating a bone fracture it is common practice to fasten one bone segment to the other so as to stabilize and immobilize them for the duration of the bone consolidation process. Thus there is the technique of internal fixation or direct mechanical fastening of the bone segments.
- Traditionally, fixation has been accomplished by variety of apparatus and techniques, the more common involving the use of metallic fastening devices such as screws, connector plates (secured to the bone by screws), pins and clips. These methods invariably involve the drilling of screw holes in the bone and the use of related equipment such as drill hole templates.
- Conventional U-shaped clips have also been used, the clip legs being installed one each in holes in the opposing bone segments. The rigid structure of such clips, like the other fixation devices mentioned above, provide rigid immobilization of the fracture zone. Such devices also served to maintain the distance between segments, which was found however, among other things, to hinder compression induced by contractions of skeletal muscles in some cases, and prevent the establishment of compressive force between the bone segments which is favorable to bone consolidation or knitting. In this regard the concept of creating dynamic compressive force across an osteotomy or bone fracture site has become well recognized as a technique to promote primary bone healing, i.e. consolidation that is faster and of better quality.
- Thus there has evolved a number of fastening devices such as clips and the like, designed to deliver compression. Accordingly in U.S. Pat. No. 3,939,294 there is provided a clasp or clip of spring material having a pair of spaced-apart, inwardly inclined legs connected by a Z-shaped upper portion. Sloped holes are drilled in adjoining bone segments and tools are used to manipulate and install one leg, and then the other leg is pulled toward the other hole, spreading the Z-shaped elastic portion, and then inserted in the other hole. Unfortunately this method requires the drilling of specially sloped holes, involves multiple steps and is time-consuming, and like the conventional rigid fastening techniques, requires relatively large surgical opening. Also, the manual installation of the clip using hemostats and the like is difficult, requires meticulous skill and handling.
- In U.S. Pat. No. 4,838,254 the legs of a pair of metallic clips are inserted in pairs of specially angled bores in respective opposing bone segments. The exposed tops of the two installed clips then serve as fastening heads for a spring that is connected between the clips.
- In U.S. Pat. No. 4,841,960 the disclosed “compression” clip is essentially a clip with opposing legs that are installed in pre-drilled holes and features a crimpable web that joins the top ends of the legs. A crimping tool is used to crimp the web in an effort to set up compression between the embedded legs.
- U.S. Pat. No. 4,852,558 also requires manual installation of separate legs in pre-drilled holes, the tops of the install legs then being interconnected with a ratchet mechanism which must be operated to draw the legs together. This design appears inherently limited regarding adjustability and maintenance of constant pressure. In U.S. Pat. No. 5,660,188 the two legs of a clip must also be installed in pre-drilled holes. The clip has a bridge of two side-by-side crimpable elements, and the jaws of a crimping tool must be used on the embedded clip to deformingly spread apart these elements, causing the legs to draw to each other. The foregoing techniques involving crimpable clips all appear to be imprecise in setting up suitable compressive forces, require hole drilling and related problems, and do not lend themselves to minimizing the size of the surgical opening.
- In view of the limitations of the afore-mentioned methods, stapling has been looked to as a potentially quick and effective way for fastening bone segments, and as a way to produce compression. Thus in U.S. Pat. Nos. 5,053,038 and 5,662,655 “compression” staples are applied to the bone by a powered stapler. These staples have legs shaped with beveled ends and/or have divergent legs that will be forced apart from each other during implantation, which flexes springy upper parts of the legs thereby tending to set up compression. Unfortunately there is concern for trauma to the bone due to driving of the compound-shaped legs into the bone mass, and there is little apparent precision in establishing the desired compressive forces.
- In view of the foregoing it is a general object of the present invention to provide an improved method and for interosseous fastening.
- A more particular object is to provide quick and simple, yet effective method for fastening bone segments with compressive force between opposing bone ends.
- Another object to provide such a method that minimizes the size of the required surgical opening and associated trauma.
- A further object to provide a method of bone stapling that minimizes trauma to the bone tissue during implantation of the staple legs.
- Yet another object is to provide a method for stapling that maximizes the capability of establishing a dynamic compression level that is optimal for enhanced osseous healing.
- A still further object is to provide simple, effective bone fixation technique that is relatively easy to learn and practice.
- Another object is to provide for compression fixation in applications where other techniques would not work or would not deliver compression. For example, conventional fastening techniques for handling a “Jones” fracture, i.e. one that is transverse to the longitudinal extent of the bone segment, is difficult to address using conventional fastening techniques, however the present invention is particularly suitable to provide fastening for such fractures.
- Still another object is to provide stapling apparatus and method in which there is enhanced selection capability regarding the level of the compressive forces to be imparted.
- There are a number of advantages in exterior bone fixation techniques, where surgical incisions are not required and fasteners are applied through the skin; and thus it is yet another object of the invention to provide a bone stapling method that lends itself well to exterior bone fixation.
- These and other objects of the present invention are achievable by way of the present invention of a bone stapling method and apparatus that uses a generally U-shaped staple having pair of spaced apart legs with sharp free ends and proximal ends interconnected by bridge that has at least one resilient curved portion, whereby spreading apart of the parallel legs lessens the curvature of the curved portions which brings the staple to a tensioned configuration in which one leg is resiliently urged towards the other. In a preferred embodiment it is seen that the bridge portion comprises a single bowed spring element, the curvature of which lies in a plane normal to the axes of the staple legs.
- The novel fastening method involves first positioning the fractured ends of a first and a second bone segment in proximate, face-to-face relationship. The next step involves spreading apart the staple legs by a certain amount and holding the staple in the resultant tensioned configuration. The extent to which the staple legs are separated can be varied in one preferred embodiment of the invention, the induced compressive forces between the legs being proportional to the amount of displacement of the legs as the bowed portion is moved through range of motion in which elastic behavior is exhibited. In this regard it should be evident that herein lies one of the advantages of the present invention, i.e. the capability of selecting the optimal compressive force for an application by spreading apart the staple legs by a predetermined amount.
- Next, as the staple is held in its tensioned configuration, it is positioned with it sharp ends forward and aligned respectively with surfaces of one bone segments and the other. Finally the positioned staple, while maintained in its tensioned configuration, is driven into the bone by percussive force, such quick application being provided by a conventional air-powered striker of a stapler according to the present invention, or by a manually stuck staple applicator according to the invention. The embedded staple legs will cause the opposing bone faces to be pressed into each other with a predetermined amount of force.
- Such stapling method lends itself advantageously to a staple with a relatively narrow profile, wherein apparatus according to the present invention include a staple applicator having within its housing means for supporting the staple and guiding its movement with legs pointed ends forwardly disposed, and adapted to receive the staple in its initial untensioned configuration engaging its legs and spreading them apart by certain amount and holding the staple in its tensioned configuration adjacent the front end of the housing, for ejection therefrom. One embodiment, of several, uses opposing first and second grooves for engaging the staple legs and means for adjustably moving one groove from the other. Another embodiment employs grooves that diverge to spread the staple legs as a staple is advanced there-along. Ejection means mounted for longitudinal movement in the housing has a front end adapted to strike the rear of the tensioned staple with percussive force which is provided by air power or electrical power in preferred embodiments.
- The invention also includes a staple applicator that is adapted for being manually driven.
- Another related bone stapling method for compressively securing adjoining bone segments uses a resilient metallic staple that has legs with an initial convergent configuration with respect to each other, and the legs are resiliently extendible into parallel relationship, in which configuration a predetermined amount of spring force will urge the legs towards their initial convergent orientation. This method includes holding the normally convergent staple in its legs-parallel configuration, positioning the so-tensioned staple with its sharp ends aligned respectively with adjacent bone surfaces; and then driving and embedding the legs of the tensioned staple in the bone segments and releasing the embedded staple, whereby the bone segments are joined, and opposing surfaces of the bone segments are caused to be pressed into engagement with each other with a certain amount of compressive force.
- An applicator or tool for such a staple includes staple-engaging means on the front end of the applicator body. Opposing jaws support the staple in a pointed-ends forward position against lateral and rearward movement, and engage inside surfaces of the convergent legs, the jaws being adapted for adjustable movement apart to cause the legs to rotate to a generally parallel orientation. Thus supported on the front end of the tool, the staple can be aligned with the bone segments, and the rear end of the tool stuck with a percussive force to cause the staple legs to be embedded into the bone segments.
- Another applicator according to the present invention has a trigger-controlled air-powered staple-driving mechanism, and has a staple feeding mechanism including ramp means that is shaped to receive and support a staple in its initial configuration on one end of said ramp means, the configuration of the ramp means gradually changing to a shape that will hold the staple with its legs generally parallel with each other. Thus the staple can be slidably pushed along the ramp means in a lateral direction, i.e. normal to the plane in which the staple legs and bridge portion lie, to bring it to a terminal position along the ramp means, in which position the rear of the tensioned staple can be struck by the front end of a powered striker.
-
FIG. 1 is perspective view of a preferred embodiment of a compression staple according to the present invention; -
FIG. 2 is top plan view of the embodiment of the staple ofFIG. 1 ; -
FIG. 3 is a rear end elevational view of the staple ofFIG. 1 ; -
FIG. 4 is a perspective view of variant of a staple according to the present invention; -
FIG. 5 is an elevational view of staple applicator according to the present invention, with parts broken away for the sake of clarity; -
FIG. 6 is a partial, perspective enlarged view of the front end of the staple applicator ofFIG. 5 ; -
FIG. 7 is a sectional view taken long the line 7-7 ofFIG. 6 ; -
FIG. 8 is sectional view taken long the line 8-8 ofFIG. 6 ; -
FIG. 9 is an enlarged, partial perspective view of the front portion of a variant of a staple applicator according to the present invention; -
FIG. 10 is an enlarged, partial perspective view of the front portion of another variant of a staple applicator according to the present invention; -
FIG. 11 is a top plan view of a manually powered stapler according to the present invention; -
FIG. 12 is a partial, enlarged perspective view of the front portion of the staple applicator ofFIG. 11 ; -
FIG. 13 is a sectional view taken along the line 13-13 ofFIG. 12 ; -
FIG. 14 is a perspective view of another variant of a compressive staple according to the present invention, wherein the staple legs have a convergent orientation with respect to each other; -
FIG. 15 is a side elevational view of the staple ofFIG. 14 ; -
FIG. 16 is a top plan view of a staple applicator according to the present invention; -
FIG. 17 is an enlarged, partial perspective view of the front end of the applicator ofFIG. 16 ; -
FIG. 18 is an enlarged partial, side elevational, partially sectional view illustrating the mounting of a staple on the front end of the staple applicator ofFIG. 16 ; -
FIG. 19 is a view similar toFIG. 18 showing a staple supported with legs parallel; -
FIG. 20 is a perspective view of a convergent-legged staple that is adapted to be fed to a powered staple applicator; -
FIG. 21 is a rear elevational view of the staple ofFIG. 20 ; -
FIG. 22 is a side elevational view of another powered applicator according to the invention; -
FIG. 23 is a perspective illustration showing means for feeding staples to the staple-driving means of the powered staple applicator shown inFIG. 22 ; -
FIG. 24 is a partial, enlarged, partial sectional side view of staple-delivering ramp member of the applicator shown inFIG. 22 ; -
FIG. 25 is a schematic illustration of the staple-striking region of the staple feeding means ofFIG. 23 ; -
FIG. 26 is a perspective view of another variant of another compression staple similar to the staple ofFIG. 1 , and adapted for use with a staple-feeding magazine or cartridge; -
FIG. 27 is a front end elevational view of the staple ofFIG. 26 ; and -
FIG. 28 is a partial sectional perspective view, with parts broken away for the sake of clarity, illustrating a magazine or cartridge for feeding the staple ofFIG. 26 to a powered staple applicator. - Referring now the drawings,
FIGS. 1-3 show that a preferred embodiment of a compression staple 11 according to the present invention has a pair oflegs 13 with sharp front ends 15 and abridge 17 that interconnects the rear end portions oflegs 13. Staple 11 is fabricated of a surgical grade, bio-compatible metal, such as stainless steel, titanium alloy or other suitable alloy.Bridge 17 functions not only to holdlegs 13 in approximate parallel relationship, but is selected to act as a spring by the flexing of its bow when the legs are spread apart as illustrated by the broken line image ofFIGS. 2 and 3 . This imparts an inward reacting force between the legs proportional to the degree of their displacement. It will be appreciated that the dimensions, gauge and curvature ofbridge 17 are selected such that it can be flexed to a tensioned state that will deliver the compression requirements of the bone fixation to which staple 11 is to be applied. - It is preferred that the opposing inside surfaces of
legs 13 are provided with serrations orbarbs 19. In this regard it is noted that, inasmuch as the insides oflegs 13 will be pressed against bone mass when they are embedded in a manner to be described, the size of such serrations or barbs can be advantageously minimized, which minimizes trauma to the bone tissue during their implantation. - It will be evident that there can be several variations of compression staples according to the principles of the invention. For example, staple legs can have various cross sectional configurations, including diamond-shaped, square, triangular and rectangular.
FIG. 4 shows avariant 23 of a staple according to the present invention, havinglegs 25. It is formed from metal rod having suitable strength and spring properties. It is also contemplated under the invention that the curvature of the bridge can take other forms than the single bow shown, and would include, among others a generally V-shape and a shape with double 90 degree bends. -
FIG. 5 shows an air-poweredstaple applicator 29 for applying staple 11, and it includesmain body 31, a conventionalair piston assembly 33 withinbody 31,air supply line 35 and a pistol grip and triggerassembly 37 for holding the stapler and for controlling the air-powered operation of thestaple head 41, to be described hereinafter. - As
FIG. 6 illustrates, thestaple head 41 features anadjustable staple mount 43 that includeslower head 45 which is a forward extension ofbody 31, andupper head 47. A pair ofparallel guide rods 51, affixed tolower head 45 and extending upwardly therefrom, slidably engage twin bores 53 in theupper head 47 so as to guide the upper head in vertical motion relative to thelower head 45. A screw jack assembly drives the upper head and includes thrustscrew 55 that engages the threaded bore 57 inlower head 45.FIG. 7 best illustrates the screw jack assembly and shows turnknob 59 that has a socket for receiving a tool such as an Allen wrench for rotating theknob 59.FIGS. 6 and 7 also show alongitudinally extending groove 65 on thelower head 45 and a corresponding parallel groove 63 on the movableupper head 47, these grooves being shaped to cradle the opposing sides ofstaple legs 13, and the knob can be operated to set the spacing between grooves to allow staple 11, in its initial un-tensioned configuration, to be mounted thereon as illustrated. - In a preferred embodiment, vertically extending gradations are provided at 67 on a forward surface of
body 31, adjacent the movable rear end ofupper head 45, so as to gauge the displacement of the staple legs when the invention is operated in a manner to be described below. - As
FIGS. 6 and 7 and 8 also show,staple applicator 29 includes mechanism for driving a staple forwardly from thestaple head 41, and includes longitudinally extendingstriker member 69 that is slidably mounted togrooves FIG. 6 .Striker member 69 hasfront surface 75 that is adapted, as best shown inFIG. 7 , to impact the rear legs of thestaple bridge 17 when thestriker member 69 is propelled to its forward position shown by the phantom lines inFIG. 6 . - In the operation of
staple applicator 29 for osteosynthesis, a staple 11 is mounted to thestaple mount 43 which is operated to bring the staple to the desired tensioned configuration. Then bone segments are brought together by manual or mechanical manipulation as close as possible and aligned with each other. Thestapler head 41 can then be positioned with its legs straddling the fracture line, and sharp ends 15 adjacent the surfaces of the bone segments. The stapler trigger can then be operated to cause the striker to drive the legs of the tensioned staple into the bone segments. - There is a variant of a staple applicator according to the invention that is identical to the embodiment of
FIGS. 6 and 7 , except that it has a striker member 69 a is designed to engage the rear ends ofstaple legs 13 instead of the rear edge of thestaple bridge 17. Thus the sectional view ofFIG. 9 shows ends 79 and 80 that are adapted to strike respectively the upper and lower rear ends ofstaple legs 13, of a staple 11 supported in tensioned configuration. It is contemplated under the invention that strikers like striker 69 a, with differently spaced ends 79 and 80 can be provided so that different sized staples can be accommodated. -
FIG. 10 shows theforward portion 81 of another variant of a power stapler applicator according to the present invention, having amain body 82, anupper staple guide 83 andlower staple guide 85. Opposing forwardportions 87 of the guides are separated by a distance allowing it to hold staple 11 in tensioned configuration, and therearward portions 89 will hold the staple in its initial configuration. The open-sided portions 91 allow a staple to be loaded by hand unto the staple guides. When the staple is pushed forwardly by hand fromportion 89 toportion 87, thedivergent portions 93 will cause the spreading apart of the staple legs, and thus a tensioned staple is positioned for ejection. - A
striker member 95 has upper andlower edges engagedin slots 101 and 103 so as to mount the striker member for longitudinal movement. The striker front ends 105 and 107 will align with and abut the rear ends of a tensioned staple. -
FIGS. 11, 12 and 13 show avariant 113 of the invention, whereby percussive force is delivered by hand using a suitable mallet. Here thebody 115 has arear portion 117 designed for being struck by a mallet, andstaple holder 119 at its front end.FIGS. 12 and 13 show how theholder 119 includeslower portion 121 that has staple leg-receivinggroove 129, and an adjustableupper part 135 withgroove 137.FIG. 12 best shows how a dove-tail portion 141 ofpart 135 fits in a complementary slot for guiding vertical movement ofpart 135. Front surfaces 145 and 147 respectively ofparts grooves screw 153 for driving thepart 135 has threads 157 that engage a threaded bore 159 in themovable part 135, and theknob 163 can be engaged by a suitable tool to rotate thescrew 153. - In using
tool 113 the sharp ends of a tensioned staple 11 can advantageously be precisely positioned on the target spots on the bone segments, then thetool end 117 struck with a mallet to implant the staple. - Referring now to
FIGS. 14 and 15 there is shown inFIG. 14 anothercompressive staple 161 according to the invention that is fabricated of a suitable resilient metal, and featureslegs bridge 167.Staple 161 can also be made of a suitable resilient non-metallic bio-absorbable material. -
FIG. 15 best shows howlegs -
FIG. 16 shows one preferred embodiment of a bone-staple applicator 171 having amain body 173 with arear end 175 adapted for being impacted by a force delivering instrument like a mallet. Thefront end 177 is designed to mount a staple 161 in its initial configuration and then move it to, and hold it in, a configuration where its legs are parallel. Thus it is seen inFIG. 17 thatfront end 177 has anupper jaw 181 that can be adjustably spaced from to alower jaw 183 using drive-screw mechanism similar to that used for the screw-drivenspreadable parts FIGS. 12 and 13 .FIG. 17 shows how theupper jaw 181, andlower jaw 183 are shaped to mount astaple 161, theslots 187 and 189 in the respective jaws being sized to receive thestaple bridge 167. A recessedportion 191 in the top ofthee jaw 181 is for supporting and stabilizing rearward portions of the upperstaple leg 163, and there is a similarly recessed portion on the under-surface of the lower jaw 183 (not shown) for supporting therearward part 196 of lowerstaple leg 165. The recessedportion 191 has ashelf 193 for engaging lower surfaces ofleg 163, and opposingedges 195 can hold the staple against lateral movement while theledge 197 is adapted to abut the rear edge of the staple leg. -
FIG. 18 best shows how anuntensioned staple 161 is first mounted within the grasp of the opposing recessed portions of thejaws inner surfaces legs screw mechanism 217 can be operated to move apart the opposing jaws, causing the opposing legs to be pushed into parallel relationship, as illustrated inFIG. 19 . When astaple 161 is thusly mounted on theapplicator tool 171, it can be used much the same as the previously describeddevice 113, to apply atensioned staple 161 to adjoining bone segments. Note that the jaw surfaces 193 and 194 can be appropriately sloped to ensure that the legs will be pushed into parallelism. -
FIGS. 20 and 21 show another embodiment of a compression staple according to the present invention, i.e. the staple 261 which is particularly adapted for application by a powered applicator, for example an electrically powered or an air-powered staple applicator such asapplicator 271 shown inFIG. 22 , to be described. Like the previously describedstaple 161, thestaple 261 is fabricated of a suitable resilient metal using conventional metal-working techniques. Thestaple legs bridge portion 267 and converge at a predetermined angle. It is noted howlegs bridge portion 267. The inside surfaces of the staple bridge and legs are adapted to slidably engage staple-feeding ramp structure, to be described. Furthermore,FIG. 21 best shows how this staple structure provides to one side of thebridge 267, opposing insidesurfaces 270 and 274 respectively oflegs staple applicator 271, in a manner to be described. - The trigger-controlled
applicator 271, shown inFIG. 22 , except for its forward end, is similar to the above-describedapplicator 29, and includes apiston assembly 275.FIG. 23 illustrates how at the forward end of theapplicator 271, there is mounted astaple feeder 273 designed to supply and position staples for engagement by thefront end 279 of astriker 281 that is connected to thepiston assembly 275. -
FIG. 23 shows that thefeeder 273 includes ahousing 285 that is attached to a sidewall of the applicator and which supports aramp member 287 that has adistal end 289 that is shaped to receivestaples 261. Thewalls staples 261 in their relaxed, legs-convergent configurations.FIG. 24 also illustrates theramp member 287 and shows how theramp walls opposite ramp end 294.FIG. 23 also illustrates that within thefeeder housing 285 there is a spring-poweredpusher 295, connected to a suitable conventional spring (not shown) for urging thepusher 295 against the rear side edges of a staple 261 mounted on theramp member 287. Thus it can be appreciated how astaple 261, or several side-by-side staples 261, can be slidably pushed towards theend 294 of the ramp member. - The enlarged view of
FIG. 25 shows how the innermost end of theramp member 287 has anend 299 that is spaced from a guidingsurface 301 ofapplicator wall 304.Surfaces 301 and the opposing upper andlower surfaces 303 and 305 form a channel asFIG. 24 shows, for receiving thestriker 281.FIG. 25 shows in broken lines atensioned staple 261 in position for being driven by thestriker 281. Note that thebridge member 267 is spaced within the above-mentioned channel, clear of the end of theramp member 287, the staple being supported by virtue of the staple leg surfaces 270 and 274 (FIG. 21 ) engaging the ramp member. Thus the strikerfront end 279 is aligned with the rear end ofstaple bridge portion 267. - In operation of
applicator 271 it is supported with its front end in close proximity to the relevant bone segments, and with the pointed ends of the staple appropriately aligned therewith. Pulling the trigger will cause thestriker end 279 to impact the staple bridge and propel the staple forwardly as the staple legs are held generally parallel by sliding engagement with the generally parallel surfaces of theramp member 287 during ejection. - The striker will have a stroke sufficient to cause the legs, in their parallel configuration, to be embedded in the bone tissue. The striker will return to its initial position rearward of the ramp member. Then spring force will cause another staple to be positioned in the ejection channel.
- Although
FIGS. 22 and 23 show thefeeder 273 connected adjacent thefront end 260 of the applicator, it should be appreciated that in some cases it is desirable that thefeeder 273 attaches to theapplicator 271 at a location spaced a greater distance to the rear of the front 260. In such cases theramp walls wall 301 are elongated forwardly as necessary to provide guide surfaces for the staple, and the stroke of thestriker 281 is increased accordingly. -
FIGS. 26 and 27 illustrate yet anothervariant 361 of the compression staple 11 described above (FIG. 1 ), and has generallyparallel legs resilient bridge 367. This configuration provides opposingsurfaces FIG. 27 , that are adapted to engage parallel guide surfaces when thestaple 361 is propelled from a poweredstaple applicator 371; to be described. InFIG. 27 the tensioned configuration ofstaple 361 in shown in broken lines. -
FIG. 28 shows afeeder 373 which is constructed similarly to the above-describedfeeder 273, except that theramp member 387 is adapted to handle thestaple 361. Thus theramp walls wall 393 slidably abuts thewall 393. - The distal end of the
ramp 387 receivesstaples 361 in their untensioned condition, and thewalls other end 395 of the ramp, astaple 361 will be supported in a legs-parallel tensioned configuration. A spring-poweredpusher 399 is adapted to urge a number of nestedstaples 361 towards theend 395 of the ramp. - The
ramp end 395 is spaced a predetermined distance from theguide surface 401 and provides surfaces that engage the opposingsurfaces staple 361. Thus the rear of a tensioned staple can be struck by thestriker 397 and ejected from the applicator. - While particular embodiments of the invention have been described, it should be understood that the invention is not limited thereto, and includes other variants and modifications that will readily occur to those persons of ordinary skill in the art, given the benefit of this disclosure. Thus it is intended that the invention be given its full scope and breath as defined in the claims which follow.
Claims (16)
- 21. A stapling method for fastening a first bone segment to a second bone segment, said first bone segment having an end to be connected to an end of said second bone segment, said method including the steps of:a) positioning the end of said first bone segment in face-to-face adjacent relationship with the end of said second bone segment;b) providing a generally u-shaped staple having a pair of spaced apart legs with sharp free ends and other ends interconnected by a bridge portion, and said staple having an initial untensioned configuration in which said legs converge with respect to each other;c) moving said staple from its initial configuration to a tensioned configuration in which said legs are held generally parallel to each other and in which said legs are resiliently urged towards their initial configurations;d) holding and positioning said tensioned staple with each of the sharp ends of said legs aligned respectively with a spot on the surface of said first and second bone segments; ande) driving and embedding the legs of said tensioned staple into said bone segments and releasing said staple, whereby the opposing faces of the bone segments are caused to be pressed into engagement with a predetermined amount of compressive force.
- 22. A method as defined in
claim 21 wherein the step of driving and embedding of said staple legs is effected by percussion. - 23. A method as defined in
claim 21 wherein said step of moving said staple to its tensioned configuration includes slidably engaging opposing inner surfaces of the legs and bridge portions of said staple in its untensioned configuration with surfaces of a ramp and then moving said staple along said ramp in a direction normal to the plane in which lie said legs and bridge portion, so that said legs slidably follow surfaces of said ramp that are configured to urge said legs into parallel relationship. - 24. A method as defined in
claim 21 wherein said step of driving and embedding said staple legs includes slidably moving said along parallel surfaces. - 25. A compression staple for fastening a first bone segment to a second bone segment, said staple comprised of a resilient material and having a generally U-shaped configuration, and comprising:a) first and second spaced-apart longitudinally extending legs with sharp free ends and proximal ends;b) a bridge portion interconnecting the proximal ends of said legs; andwherein said legs have a convergent orientation, one to the other, and said legs are adapted to be resiliently held in a parallel orientation wherein said legs are urged towards their initial convergent orientation with a predetermined force.
- 26. A staple as defined in
claim 25 wherein said legs are wider than said bridge portion. - 27. A staple as defined in
claim 26 wherein said bridge portion lies to one side of said legs and the other sides of said legs have opposing generally flat surfaces. - 28. A bone staple applicator for a generally U-shaped staple having a first and a second spaced apart legs with sharp free ends and proximal ends interconnected by a bridge portion, and an initial configuration where said legs are convergently oriented, and said staple capable of a tensioned configuration in which said legs are held in parallel relationship, said staple applicator including:a) an elongate body with a front end and a rear end, and including:i) means on said body front end for supporting said staple against rearward and lateral movement with the sharp ends of its legs forwardly disposed, and adapted for engaging opposing portions said legs and moving said legs into parallel relationship.
- 29. A bone staple applicator as defined in
claim 28 wherein said tool body has a handle portion, and said rear end is adapted for being struck a percussive blow. - 30. A bone staple applicator for a generally U-shaped staple having a first and a second spaced-apart legs with sharp free ends and proximal ends interconnected by a bridge portion, and wherein said legs have an initial convergent orientation one to the other, and said staple capable of a tensioned configuration in which said legs are held in parallel relationship, said parallel legs urged towards their initial convergent orientation by certain spring force; said staple applicator including:a) a longitudinally extending body with a front end and a rear end, and including:i) means on said body front end for supporting said staple in its tensioned configuration with the sharp ends of its legs forwardly disposed, and adapted for engaging opposing inside surfaces of said legs and for guiding longitudinal forward movement of said tensioned staple;ii) means for moving said staple from its initial orientation to its tensioned configuration, and for delivering said staple to said staple supporting means; andiii) means mounted to said body for striking the rear end of said tensioned staple with percussive force for driving said tensioned staple forwardly from said staple-supporting means.
- 31. An applicator as defined in
claim 30 wherein said striking means includes an elongate striker mounted to said body for longitudinal movement, and having a front end adapted for impacting the rearward end portion of said staple. - 32. An applicator as defined in
claim 30 wherein said means for supporting said staple includes opposing first and second supports adapted for engaging respectively the first and second legs of said staple, and mounted for being adjustably spread apart so as to move said legs to a parallel orientation. - 33. An applicator as defined in
claim 32 wherein said means for adjustably moving said supports comprises drive means, engaging said first and second supports. - 34. An applicator as defined in
claim 33 wherein said drive means includes drive screw mechanism. - 35. An applicator as defined in
claim 30 wherein said means for moving said staple and delivering said staple includes elongate ramp means adapted for slidably engaging inner surfaces of said staple legs and bridge portion, and having surfaces configured so that said legs are pushed from their divergent orientation to parallel orientation by virtue of moving said staple in a direction along said ramp in a direction normal to the plane in which said legs and bridge portion lie; and means for pushing said staple along said ramp means. - 36. An applicator as defined in
claim 35 including means for biasing a staple along said ramp means towards the proximal end of said ramp means.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/896,360 US20050096660A1 (en) | 1999-04-26 | 2004-07-20 | Compression bone staple, apparatus and method |
US13/209,326 US20120024937A1 (en) | 1999-04-26 | 2011-08-12 | Compression bone staple, apparatus and method of the invention |
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Application Number | Priority Date | Filing Date | Title |
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US09/299,285 US6059787A (en) | 1999-04-26 | 1999-04-26 | Compression bone staple apparatus and method |
US09/500,060 US6348054B1 (en) | 1999-04-26 | 2000-02-08 | Stapling method for fastening a first bone segment to a second bone segment |
US09/985,719 US6783531B2 (en) | 1999-04-26 | 2001-11-06 | Compression bone staple, apparatus and method |
US10/896,360 US20050096660A1 (en) | 1999-04-26 | 2004-07-20 | Compression bone staple, apparatus and method |
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US09/500,060 Expired - Lifetime US6348054B1 (en) | 1999-04-26 | 2000-02-08 | Stapling method for fastening a first bone segment to a second bone segment |
US09/985,719 Expired - Lifetime US6783531B2 (en) | 1999-04-26 | 2001-11-06 | Compression bone staple, apparatus and method |
US10/896,360 Abandoned US20050096660A1 (en) | 1999-04-26 | 2004-07-20 | Compression bone staple, apparatus and method |
US13/209,326 Abandoned US20120024937A1 (en) | 1999-04-26 | 2011-08-12 | Compression bone staple, apparatus and method of the invention |
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US09/500,060 Expired - Lifetime US6348054B1 (en) | 1999-04-26 | 2000-02-08 | Stapling method for fastening a first bone segment to a second bone segment |
US09/985,719 Expired - Lifetime US6783531B2 (en) | 1999-04-26 | 2001-11-06 | Compression bone staple, apparatus and method |
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US13/209,326 Abandoned US20120024937A1 (en) | 1999-04-26 | 2011-08-12 | Compression bone staple, apparatus and method of the invention |
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EP (2) | EP1179994B1 (en) |
JP (1) | JP4256074B2 (en) |
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AU (1) | AU775585B2 (en) |
CA (2) | CA2368248C (en) |
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US20090062800A1 (en) * | 2006-02-11 | 2009-03-05 | Majid Shano | Clip-Like Implant for Osteosynthesis |
US8475457B2 (en) * | 2006-02-11 | 2013-07-02 | Majid Shano | Clip-like implant for osteosynthesis |
FR2902636A1 (en) * | 2006-06-21 | 2007-12-28 | T H T Textile Hi Tec Sa | SURGICAL COMPRESSION STAPLER PLANT ASSEMBLY |
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US8062297B2 (en) | 2008-07-24 | 2011-11-22 | Biopro, Inc. | Bone fixation apparatus and method of manufacture |
US20100023062A1 (en) * | 2008-07-24 | 2010-01-28 | Biopro, Inc. | Bone fixation apparatus and method of manufacture |
US20100133316A1 (en) * | 2008-11-28 | 2010-06-03 | Emmanuel Lizee | Instrument and assembly for fitting a compression staple |
US20100237128A1 (en) * | 2009-03-19 | 2010-09-23 | Core Essence Orthopaedics, Llc | Method and apparatus for delivering a shape memory article to a surgical site |
CN102413773A (en) * | 2009-03-19 | 2012-04-11 | 核心基本整形外科股份有限公司 | Method and apparatus for delivering a shape memory article to a surgical site |
US10716562B2 (en) | 2009-03-19 | 2020-07-21 | Osteomed Llc | Method and apparatus for delivering a shape memory article to a surgical site |
WO2010107549A1 (en) * | 2009-03-19 | 2010-09-23 | Core Essence Orthopaedics, Llc | Method and apparatus for delivering a shape memory article to a surgical site |
US8596514B2 (en) | 2009-03-19 | 2013-12-03 | Ot Medical, Llc | Method and apparatus for delivering a shape memory article to a surgical site |
US9872681B2 (en) | 2009-03-19 | 2018-01-23 | Osteomed Llc | Method and apparatus for delivering a shape memory article to a surgical site |
WO2010150178A3 (en) * | 2009-06-26 | 2011-04-07 | Simcha Milo | Surgical stapler |
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US8393517B2 (en) * | 2009-06-26 | 2013-03-12 | QuickRing Medical Technologies, Ltd. | Surgical stapler and method of surgical stapling |
US10512459B2 (en) * | 2011-07-27 | 2019-12-24 | William Casey Fox | Bone staple, instrument and method of use and manufacturing |
US20130030437A1 (en) * | 2011-07-27 | 2013-01-31 | William Casey Fox | Bone staple, instrument and method of use and manufacturing |
US10064618B2 (en) | 2012-01-20 | 2018-09-04 | Zimmer, Inc. | Compression bone staple |
US9204932B2 (en) | 2012-02-16 | 2015-12-08 | Biomedical Enterprises, Inc. | Apparatus for an orthopedic fixation system |
US20170100121A1 (en) * | 2013-03-15 | 2017-04-13 | Orthohelix Surgical Designs, Inc. | Bone staple storage, inserter, and method for use therewith |
US10507021B2 (en) * | 2013-03-15 | 2019-12-17 | Orthohelix Surgical Designs, Inc. | Bone staple storage, inserter, and method for use therewith |
US20140277516A1 (en) * | 2013-03-15 | 2014-09-18 | Orthohelix Surgical Designs, Inc. | Bone staple storage, inserter, and method for use therewith |
US11504114B2 (en) * | 2013-03-15 | 2022-11-22 | Orthohelix Surgical Designs, Inc. | Bone staple storage, inserter, and method for use therewith |
US9486212B2 (en) * | 2013-03-15 | 2016-11-08 | Orthohelix Surgical Designs, Inc. | Bone staple storage, inserter, and method for use therewith |
US9585656B2 (en) | 2013-06-03 | 2017-03-07 | Biomedical Enterprises, Inc. | Method and apparatus for loading and implanting a shape memory implant |
US9861413B2 (en) | 2013-11-11 | 2018-01-09 | Arthrex, Inc. | Screws for generating and applying compression within a body |
US10064619B2 (en) | 2013-11-13 | 2018-09-04 | Arthrex, Inc. | Staples for generating and applying compression within a body |
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US9931115B2 (en) | 2013-11-13 | 2018-04-03 | Arthrex, Inc. | Delivery device to deliver a staple |
US10610218B2 (en) | 2013-11-13 | 2020-04-07 | Arthrex, Inc. | Staples for generating and applying compression within a body |
US9861357B2 (en) | 2013-11-13 | 2018-01-09 | Arthrex, Inc. | Staples for generating and applying compression within a body |
US9855036B2 (en) | 2013-11-13 | 2018-01-02 | Arthrex, Inc. | Staples for generating and applying compression within a body |
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US11871899B2 (en) | 2013-12-20 | 2024-01-16 | Crossroads Extremity Systems, Llc | Bone plates with dynamic elements |
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US10016198B2 (en) | 2014-11-13 | 2018-07-10 | Arthrex, Inc. | Staples for generating and applying compression within a body |
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US10898249B2 (en) | 2015-01-28 | 2021-01-26 | Arthrex, Inc. | Self-compressing screws for generating and applying compression within a body |
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Also Published As
Publication number | Publication date |
---|---|
DE60032230D1 (en) | 2007-01-18 |
DE60043596D1 (en) | 2010-02-04 |
JP4256074B2 (en) | 2009-04-22 |
EP1179994A1 (en) | 2002-02-20 |
DE60032230T2 (en) | 2007-10-11 |
WO2000064361A1 (en) | 2000-11-02 |
JP2002541967A (en) | 2002-12-10 |
ES2277836T3 (en) | 2007-08-01 |
US20120024937A1 (en) | 2012-02-02 |
CA2684436A1 (en) | 2000-11-02 |
AU775585B2 (en) | 2004-08-05 |
CA2368248A1 (en) | 2000-11-02 |
EP1179994B1 (en) | 2006-12-06 |
EP1772107B1 (en) | 2009-12-23 |
CA2684436C (en) | 2012-09-18 |
ATE452588T1 (en) | 2010-01-15 |
EP1179994A4 (en) | 2004-07-07 |
ES2338583T3 (en) | 2010-05-10 |
CA2368248C (en) | 2010-02-02 |
US20020173793A1 (en) | 2002-11-21 |
US6783531B2 (en) | 2004-08-31 |
ATE347321T1 (en) | 2006-12-15 |
AU4485000A (en) | 2000-11-10 |
US6059787A (en) | 2000-05-09 |
US6348054B1 (en) | 2002-02-19 |
EP1772107A1 (en) | 2007-04-11 |
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