WO2012030141A2

WO2012030141A2 - Interspinous process spacer

Info

Publication number: WO2012030141A2
Application number: PCT/KR2011/006408
Authority: WO
Inventors: 김경학; 김윤혁; 김현집; 김기정; 윤상훈; 현승재
Original assignee: (주)서한케어
Priority date: 2010-08-30
Filing date: 2011-08-30
Publication date: 2012-03-08
Also published as: WO2012030141A3; KR101724649B1; KR20120021276A

Abstract

Disclosed is an interspinous process spacer to be interposed between the posterior spinous processes of a vertebral body so as to inhibit stenosis among spinous processes. The disclosed interspinous process spacer comprises a main body having a spacing portion to space interspinous processes apart by a predetermined gap, and a blade portion formed at one side of the spacing portion to prevent the separation of the spacing portion, wherein the main body has a predetermined operating space formed at the other side of the spacing portion, and a separation prevention member installed in the operating space such that the separation prevention member is movable between a first location, which is an insertion location, and a second location for preventing the separation of the main body, wherein the separation prevention member prevents the separation of the spacing portion, and is locked at the second location.

Description

Dolmen Period spacer

The present invention relates to a medical spacer, and more particularly, to a spinous process spacer inserted between the posterior spinous process of the vertebral body and suppressing stenosis between the spinous processes.

In general, degenerative lumbar spinal canal stenosis is a phenomenon in which the spinal canal, intervertebral cavity, nerve roots, etc. are narrowed by the degeneration of the lumbar spine. The resulting pressure on the nerves causes pain, numbness and cramps in the lower back, hips, and legs and causes nervous system disorders.

There is an intervertebral fusion using an intervertebral insert cage and a posterior pedicle screw as a surgical treatment for the above diseases. This fusion technique often removes or destroys many elements of the spine, such as the lamina and spinous processes, which can lead to structural deformation of the spine and instability of each region. In addition, the fusion technique completely restricts the movement of the surgical site, which may cause a problem in that the movement of the adjacent segment is increased to accelerate lumbar degeneration.

As a new surgical method to solve the problem of the fusion technique, the spinous process inserting the insertion of a fixing mechanism (a spinal process spacer) between the posterior spinal process of the vertebral body is being performed. The spinous process spacer serves to lift the height of the lumbar segment reduced by the degeneration of the intervertebral disc to the height of the normal lumbar spine. Accordingly, the path through which the nerve bundle passes is no longer narrowed, limiting extension movements and making a slight bend to reduce pain.

A spinous process spacer used for spinous process implantation, the U-shaped fastener (Interspinous-U) developed by Fixano, France, and St. X STOP, developed by Francis Medical Technologies, has been disclosed.

On the other hand, it is pointed out that the U-shaped fixation mechanism is so rigid that it completely restricts the temple, which may cause degeneration of other adjacent lumbar segments like fusion. In the case of the procedure using X-STOP, the spinal ligament is removed without removing the spuraspinous ligament and interspinous ligament. ) From the side of the spine. When the procedure using the X-STOP, one wing is inserted in a separated state and then the separated wing is fastened, so the procedure is inconvenient and the procedure takes a long time. In addition, since X-STOP is made of a titanium material having strength above bone, since X-STOP does not absorb the cyclic load of the human body after the procedure, the cyclic load is transferred to the lower node as it is, and the spinous processes are damaged and secondary. May cause a risk of side effects.

The present invention has been made in view of the above problems, to facilitate the procedure and to reduce the procedure time, and to increase the decompression effect without interfering with the lumbar segment movement, and to prevent spinous process damage and secondary side effects It is an object of the present invention to provide a spinous process spacer applied to spinous process implantation of a structure that can be made.

In order to achieve the above object, the present invention, in the spinous process spacer inserted between the adjacent spinous process to suppress the stenosis between the spinous process, a spacing part for spacing the spacing between the spinous process at a predetermined interval, and on one side of the spacing part A main body provided with a wing to prevent separation of the separation part, and a predetermined working space formed on the other side of the separation part; The operation space is variably between the first position which is an insertable position and the second position which is a position which prevents the detachment of the main body.

The detachment preventing member may include an operation unit to be changed from the first position to the second position by the interference with the spinous process when inserted between the spinous processes.

The departure preventing member may include first and second departure preventing members installed in the working space to be rotated in opposite directions when varying from the first position to the second position.

The first departure preventing member includes: a first departure preventing part preventing the departure of the main body at the second position; A first interlocking portion interlocked with the second separation preventing member; The first locking part may include a first locking part for locking the first release preventing part at the second position.

The second departure preventing member includes: a second departure preventing portion preventing the departure of the main body at the second position; A second interlocking unit interlocked with and interlocked with the first interlocking unit; It may include a second locking portion for locking the second departure preventing portion in the second position.

Here, an end portion of at least one of the first release preventing portion and the second release preventing portion is formed to be tapered to facilitate insertion between the spinous processes at the first position.

Each of the first interlocking portion and the second interlocking portion may be formed of cog wheels that are meshed with each other.

In the second position, the first locking portion and the second locking portion may be hooked to each other.

Further, in the second position, at least one of the first locking portion and the second locking portion may be hooked, ratcheted or screwed with respect to the main body.

The width of the spacer in the transverse spinous process may be tapered to gradually narrow toward the distal end of the spinous process toward the spinal body.

In addition, the separation portion of the main body is made of a polyether ether ketone (PEEK) material, at least one of the wing portion and the separation preventing member of the main body may be made of PEEK material or titanium material.

In addition, the present invention may further include a bending member formed on the main body and the separation preventing member, the bending member for bending the spinous process through the bending portion at the second position. The bending member may be made of a polyester material.

In addition, at least one of the spaced apart portion, the wing portion, and the separation preventing member may include a spike portion formed at a portion opposite to the spinous process, thereby increasing the fixing force between the spinous process.

In addition, a surgical tool insertion hole may be formed in the wing portion of the main body. As the surgical tool insertion hole, the wing portion is spaced apart by a predetermined interval in the vertical direction of the wing portion and is formed with first and second insertion holes different in at least one of a shape and a size, so as to misinsert the surgical tool. You can prevent it.

The spinous process spacer according to the present invention is applied to a minimal incision that is performed without removing the spinal ligament, thereby minimizing skin incision and removal of biological tissue. Accordingly, there is an advantage that can reduce the surgical recovery time, and alleviate the pain.

In addition, the present invention has a structure in which the separation prevention member is locked after moving to the separation prevention position by interaction with the spinous process when inserting the spinous process spacer into the dissected spinal ligament, it is easy to perform the procedure and reduce the procedure time There is an advantage that it can.

In addition, the present invention is composed of a polyether ether ketone (PEEK) material which is a biopolymer that is harmless to the human body, and has a similar elastic modulus as the cortical bone of the human body. It can increase. Accordingly, since the human body load can be dispersed, there is an advantage that the risk of damage to the spinous processes and the risk of secondary side effects can be reduced.

In addition, by forming the shape of the separation portion anatomically similar to the shape of the spine, it is possible to prevent the fracture of the spine due to load load by the spacer during the spinous process during the procedure.

In addition, in forming the surgical tool insertion hole for inserting the surgical tool, it is possible to prevent the misinsertion of the spinous process spacer, and to prevent the release of the spinous process spacer from the surgical tool during the procedure.

1 is a partial perspective view showing the main portion of the spine and spinous process spacer according to an embodiment of the present invention.

Figure 2 is an exploded perspective view showing a spinous process spacer according to a first embodiment of the present invention.

3A and 3B are schematic cross-sectional views showing shapes at first and second positions of the spinous process spacer according to the first embodiment of the present invention.

4A to 4C are schematic views for explaining the operation of the spinous process spacer according to the first embodiment of the present invention.

5 and 6 are a cross-sectional view and a side view showing the main portion of the spinous process spacer according to the second embodiment of the present invention.

7 is a cross-sectional view showing the spine of the spinous process spacer according to the second embodiment of the present invention in a state where it is treated.

8 is a plan view showing a spinous process spacer according to a third embodiment of the present invention.

9 to 15 are schematic views for explaining various modifications of the locking structure of the spinous process spacer according to the present invention.

16 is an exploded perspective view showing a spinous process spacer in accordance with a fourth embodiment of the present invention;

17 is a perspective view showing an appearance at a second position of the spinous process spacer according to the fourth embodiment of the present invention.

FIG. 18 is a plan view of FIG. 17 illustrating a coupling relationship of spinous process spacers to spinous processes; FIG.

19 is a schematic cross-sectional view of a spinous process spacer according to a fourth embodiment of the present invention, illustrating a surgical tool insertion relationship.

20 is a partial cross-sectional plan view of FIG. 17 illustrating a surgical tool insertion relationship;

Hereinafter, the spinous process spacer according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this embodiment, the first and second positions are defined as positions in which the spinous process spacers are arranged as shown in Figs. 3A and 3B, respectively.

Referring to the drawings, the vertebrae 1 includes a Vertebral body 2 consisting of several nodes,

spinous processes

3 and 4 protruding rearwardly of the vertebral body 2 and a transverse protrusion 5. Include. In addition, the spine (1) has seven kinds of ligaments (Ligament) to connect the spinal nodes, so that each spine has mobility. The ligament includes an interspinous ligament 7 provided between neighboring spinous processes 3.

The spinous process spacer 10 according to the embodiment of the present invention cuts the spinal ligament 7 and is inserted into the cutout portion 7a by a side approach insertion method. That is, the spinous process spacer 10 is inserted between neighboring

spinous processes

3 and 4 to prevent stenosis between

spinous processes

3 and 4.

The spinous process spacer 10 of the present invention may be used in a patient whose narrowing of the spinal canal or intervertebral cavity or a hypertrophy of a yellow ligament (Ligamentum flavum) is confirmed by diagnostic equipment such as X-ray or MRI. That is, when bent forward, it can be applied to patients with a limited physical function, which is symptomatic of relief of pain in legs, hips and groin. In addition, the spinous process spacer 10 of the present invention is applied to the minimal incision that is performed without removing the interspinous ligament, thereby minimizing skin incision and removal of biological tissue of the patient.

2 is an exploded perspective view showing the spinous process spacer according to the first embodiment of the present invention, Figures 3a and 3b is a view showing the spinous process spacer at each of the first position and the second position according to the first embodiment A schematic cross section.

Referring to the drawings, the spinous process spacer 10 according to the first embodiment is the main body 20 is inserted between the spinous process (3, 4 of Fig. 1), and the main body 20 is installed in the main body 20 of It includes a departure prevention member 30 for preventing the departure.

The main body 20 includes a spaced portion 21 spaced apart from two neighboring

spinous processes

3 and 4 by a predetermined interval, and a wing portion 25 provided on one side of the spaced portion 21, and the spaced portion 21. On the other side of the predetermined operating space 23 is formed. Spacer 21 is located in the incision portion of the spinal ligament (7 of FIG. 1) after the procedure, to space between the two spinous process (3, 4). Wing portion 25 is formed to protrude in the longitudinal direction (vertical direction) of the spine on one side of the spaced portion 21, to prevent the spaced portion 21 with the separation prevention member 30 after the procedure.

The separation preventing member 30 is rotatably installed in the operating space 23 of the main body 20. That is, the separation preventing member 30 is a first position (an separation prevention member position shown in FIG. 3A), which is an insertable position, and a second position (position prevention prevention shown in FIG. 3B), which is a position which prevents the separation of the main body 20. Member positions) are variably provided in the working space 23. In addition, the release preventing member 30 is locked at the second position, thereby preventing the reverse direction from being changed from the second position to the first position. The anti-separation member 30 includes

operating portions

31a and 41a which, when inserted between the

spinous processes

3 and 4, change from the first position to the second position by interference with the spinous process.

In addition, the departure prevention member 30 is the first departure prevention member 31 and the second departure prevention member installed in the operating space 23 so as to rotate in conjunction with each other when the variable from the first position to the second position. 41 may be included.

The first departure preventing member 31 may include a first release preventing portion 33 which prevents the main body 20 from being separated from the second position, a first interlocking portion 35 interlocked with the second release preventing portion 43, and And a first locking portion 37 for locking the first departure preventing portion 33 in a second position.

The second departure preventing member 41 is installed in the working space 23 so as to be symmetrical with respect to the first departure preventing member 31, and the second departure preventing part for preventing the departure of the main body 20 in the second position ( 43), a second interlocking portion 45 which is interlocked with and interlocked with the first interlocking portion 35, and a second locking portion 47 for locking the second departure preventing portion 43 in the second position. .

Each of the first and second

departure preventing portions

33 and 43 may be tapered as shown in FIG. 3A to facilitate insertion between the

spinous processes

3 and 4 at the first position.

In addition, the fastening holes 31b at predetermined positions of the first and second

departure preventing members

31 and 41 and the main body 21 corresponding to the rotation centers of the first and second

departure preventing members

31 and 41, respectively. , 41b and 23a, and by coupling the screw 27 to the

fastening holes

31b, 41b and 23a, respectively, the first and second

release preventing members

31 and 41 are attached to the main body 20. It can be fastened rotatably. Here, it is also possible to couple the fixing pin instead of the screw 27. In addition, the screw 27 or the pin may be made of titanium (Titanium) material to function as a marker (marker). That is, when the screw to the pin is made of titanium material, the shape is revealed unlike the case where the screw or pin is made of PEEK material during X-ray imaging. Therefore, the position of the spacer can be accurately known through the location of the screw or pin. In addition, the screw 27 or pin may be made of a polyether ether ketone (PEEK) material which is a kind of biopolymer.

Each of the first interlocking part 35 and the second interlocking part 45 may be formed of cog wheels that are geared to each other. Therefore, when the

actuating parts

31a and 41a of at least one of the first and second

departure preventing members

31 and 41 come into contact with the

spinous processes

3 and 4, the first and second departure preventing members 31 are separated. 41 are interlocked with each other and rotated in opposite directions to each other. For example, when the spinous process spacer is arranged as shown in FIGS. 3A and 3B, when the actuating part 31a of the first release preventing member 31 is pressed, the first release preventing member 31 is a clock. Direction, the rotational force is such that the second departure preventing member 41 is rotated counterclockwise through the first and second interlocking portions (35, 45). On the contrary, even when the second release preventing member 41 is pressed, the first release preventing member 31 is rotated in the same manner. As described above, by forcing the movement of the first and second

departure preventing members

31 and 41 through the first and second interlocking

portions

35 and 45, any wing does not rotate normally during the procedure. There is an advantage that can be prevented fundamentally.

In addition, the first locking portion 37 and the second locking portion 47 fix the first release preventing member 31 and the second release preventing member 41 at the second position, respectively, by hooking and ratcheting. Lock with a combination of screws, etc. In this embodiment, the first detachment preventing member 31 and the second detachment preventing member 41 are shown to be hooked to each other by way of example, a detailed description of the other coupling method will be described later.

3A and 3B, the first locking portion 37 protrudes and includes a latch 37a formed on one side of the protruding portion. The second locking portion 47 is formed in a concave shape that can accommodate the first locking portion 37, and includes a locking jaw 47a formed at a position corresponding to the clasp 37a. Therefore, when the separation prevention member is moved from the first position to the second position, the latch 37a is automatically caught by the locking jaw 47a at the second position, thereby preventing the first separation prevention member 31 and the second departure prevention member. The member 41 is locked to each other.

The spaced portion 21 of the main body 20 may be made of polyether ether ketone (PEEK) material. Since it has a modulus of elasticity similar to that of the human cortical bone, the absorption rate of the repetitive load of the human body may be increased as compared with the production of titanium material. Accordingly, since the human body load can be dispersed, there is an advantage that the risk of damage to the spinous processes and the risk of secondary side effects can be reduced.

In addition, at least one of the wing portion 25 and the separation preventing member 30 of the main body 20 may be made of a PEEK material or a titanium material. In particular, when the titanium material is composed of X-rays after the procedure, unlike PEEK, the shape is revealed, so the position of the spacer can be accurately known.

4A to 4C are schematic views for explaining an operation of the spinous process spacer according to the exemplary embodiment of the present invention.

Referring to FIG. 4A, a spacer 10 is inserted between neighboring

spinous processes

3 and 4 with the first and second

departure preventing members

31 and 41 positioned at the first position.

Subsequently, as shown in FIG. 4B, in the process of inserting the spacer 10 between the

spinous processes

3 and 4, the operating

portions

31a and 41a come into contact with each of the

spinous processes

3 and 4. The first and second

separation prevention members

31 and 41 rotate while interlocking with each other. Next, while the first and second

departure preventing members

31 and 41 are positioned at the second position, the first and second departures are caused by mutual locking between the first and

second locking portions

37 and 47. The

prevention members

31 and 41 are fixed.

Subsequently, as shown in FIG. 4C, the center portion of the spacer 21 is positioned between the

spinous processes

3 and 4, thereby completing the insertion of the spacer 10.

The spinous process spacer 10 according to the embodiment of the present invention configured as described above is to be locked to the release prevention member 20 is automatically changed to the release prevention position during the insertion procedure, thereby greatly reducing the operation time There is an advantage that it can.

In addition, as shown in FIGS. 5 to 7, the spinous process spacer 10 according to the embodiment of the present invention may move the spacer 10 to the

spinous processes

3 and 4 at the second position (see FIG. 3B). It may further include a bending member 50 for bending. To this end, bending

portions

25a, 33a, 43a are formed in each of the wing portion 25 and the separation preventing member 30 of the main body 20, and the

bending portions

25a, 33a, 43a are formed. By using the bending member 50 to be bent through, the spacer 10 inserted between the

spinous processes

3 and 4 may be bent. The bending member 50 may be made of a polyester material.

In addition, the spinous process spacer 10 according to the embodiment of the present invention, as shown in Figure 8, spikes to increase the fixing force between the spinous process (3, 4) in the second position (see Figure 3b) The unit 60 may further include.

Referring to FIG. 8, the spike portion 60 is formed at a portion facing the

spinous process

3 and 4 of at least one of the spacer 21, the wing 25, and the separation preventing member 30. The spike portion 60 may be formed in a sawtooth shape. By forming the spike portion 60 in this way, it is possible to prevent the spacer 10 from flowing between the

spinous processes

3 and 4.

Hereinafter, various embodiments of fixing each of the first departure preventing member 31 and the second departure preventing member 41 will be described in detail with reference to FIGS. 9 to 15B.

Referring to FIG. 9, the first release preventing member 31 and the second release preventing member 41 may be locked by hooking with each other. To this end, the first locking portion 237 is formed to protrude, and includes

clasps

237a and 237b respectively formed on both sides of the protruding portion. The second locking portion 247 is formed in a concave shape that can accommodate the first locking portion 237, and includes a pair of locking

jaws

247a and 247b formed at positions corresponding to the latch 237a. . Accordingly, when the departure prevention member is moved from the first position to the second position, the latch 237 is automatically caught by the locking jaw 247 at the second position, and the first separation prevention member 31 and the second departure prevention member are moved. The member 41 is locked to each other.

In addition, the first departure preventing member 31 and the second departure preventing member 41 may be fixed by a hook coupling to the main body 20, as shown in Figure 10 to 12b.

Referring to FIG. 10, the first and

second locking portions

337 and 347 protrude from the respective first and second

release preventing wings

31 and 41 in the opposite direction to the inserting direction of the spacer to function as a latch. Do it. Here, the main body 20 includes a locking step 313 formed at a position corresponding to each of the first and

second locking portions

337 and 347 at the second position. Therefore, when the first and second

departure preventing blades

31 and 41 are rotated from the first position to the second position, each of the first and

second locking portions

337 and 347 in the second position engages the locking step ( While automatically caught by 313, each of the first release preventing member 31 and the second release preventing member 41 is locked with respect to the main body 20.

11A and 11B, each of the first and

second locking portions

437 and 447 is formed to be elastically deformable on a plate surface of each of the first and

second release barriers

31 and 41.

Clasps

437a and 447a are formed at the ends of the first and

second locking portions

437 and 447. Here, the engaging groove 413 is formed at the position corresponding to each of the first and

second locking portions

437 and 447 at the second position in the portion where the operating space of the main body 20 is formed. Therefore, each of the

clasps

437a and 447a is automatically caught by the catching groove 413 in the second position, so that each of the first release preventing member 31 and the second release preventing member 41 with respect to the main body 20. Locked.

12A and 12B, each of the first and

second locking portions

537 and 547 is formed to be elastically deformable on the outer circumference of each of the first and second

release preventing wings

31 and 41.

Clasps

537a and 547a are formed at the ends of the first and

second locking portions

537 and 547. Here, the engaging groove 513 is formed in the operating space of the main body 20 at positions corresponding to the first and

second locking portions

537 and 547 at the second position. Accordingly, each of the latches 537a and 537b is automatically caught in the locking groove 513 in the second position, so that each of the first release preventing member 31 and the second release preventing member 41 is relative to the main body 20. Locked.

In addition, the first departure preventing member 31 and the second departure preventing member 41 may be fixed by screwing the main body 20, as shown in Figure 13a to 14b.

13A and 13B, first fastening holes 637 and 647 penetrating the plate surface are formed in each of the first and second

departure preventing wings

31 and 41. In addition, each of the pair of second fastening holes 613 is formed at a position corresponding to the first fastening holes 637 and 647 in the working space of the main body 20. Therefore, by fastening the second fastening hole 613 and the

first fastening hole

637, 647 through the fastening screw 615 in the second position, the first departure preventing member 31 and the second departure preventing member ( 41) each may be locked relative to the body 20. FIG.

14A and 14B, the first release preventing member 31 and the second release preventing member 41 may be fixed to the main body 20 using one fastening screw 715. To this end,

fastening grooves

737 and 747 through which the fastening screw 715 penetrate the first and second

separation preventing members

31 and 41 are formed, respectively. In addition, a fastening hole 713 is formed at a position corresponding to the

fastening grooves

737 and 747 in the working space of the main body 20. Therefore, through the fastening screw 715 in the second position, it is screwed through the fastening grooves (737, 747). In this case, as the working space is narrowed, the first release preventing member 31 and the second release preventing member 41 may be pressed to lock the main body 20.

In addition, the first departure preventing member 31 and the second departure preventing member 41 may be fixed by a ratchet coupling to the main body 20, as shown in FIG.

Referring to FIG. 15, ratchet

teeth

837 and 847 are formed in each of the first and second

departure preventing wings

31 and 41. The main body 20 includes a detent 813 formed at a position corresponding to the

ratchet teeth

837 and 847 of the working space. Therefore, when the separation prevention member is moved from the first position to the second position, the

ratchet teeth

837 and 847 elastically deform the detent 813 to avoid interference, thereby smoothly moving. On the other hand, the detent 813 suppresses reverse rotation of the first and second

release preventing members

31 and 41, thereby preventing the first release preventing member 31 and the second release preventing member 41 in the second position. Each can be locked against the body 20.

As described above, the present invention has a structure in which the release preventing member is locked after moving to the anti-separation position by the interaction with the spinous process when the spacer is inserted into the injured spinal ligament, or by simple screwing. By having a structure that is locked, there is an advantage that the procedure is easy and the procedure time can be reduced.

16 to 20 are views for explaining the spinous process spacer according to the fourth embodiment of the present invention.

Referring to the drawings, the spinous process spacer 10 according to the fourth embodiment is the main body 120 is inserted between the spinous process (3, 4 of Fig. 1), and the main body 120 is installed in the main body 120 of It includes a departure prevention member 130 for preventing the departure.

The main body 120 includes a spacing portion 121 spaced apart from two neighboring

spinous processes

3 and 4 by a predetermined interval, and a wing portion 125 provided on one side of the spacing portion 121, and the spacing portion 121. The other side of the predetermined operating space 123 is formed. Spacer 121 is located in the incision portion of the spinal ligament (7 of Figure 1) after the procedure, to space between the two spinous process (13, 4).

Here, the spacer 121 may have a shape as shown in FIG. 18. That is, the widths W1 and W2 of the spacing portions in the transverse direction of the spinous process 3 may be tapered to gradually narrow toward the distal direction of the spinous process 3 at the vertebral body 2. That is, the end width W1 of the vertebral body 2 side of the spacing part 121 is formed wider than the end width W2 of the spacing part 121 end side of the spinous process 3. This takes into account that the widthwise direction of the spinous process 3 becomes narrower toward the distal end from the vertebral body 2 side.

As such, in the case of forming the spaced portion 121, by having an anatomically similar design to the shape of the spine, the load may be evenly distributed to the spine.

The wing portion 125 is formed to protrude in the longitudinal direction (vertical direction) of the spine on one side of the spaced portion 121, thereby preventing the spaced portion 121 from being separated along with the separation preventing member 130 after the procedure. As a means for attaching the spinous process spacer to the surgical tool (200 of FIG. 19), the surgical tool insertion hole 172 may be formed in the wing 125.

Referring to FIG. 19, the wing part 125 is a surgical tool insertion hole 172 which is spaced apart by a predetermined interval in the vertical direction of the wing part 125 and has at least one of a shape and a size different from each other.

Insertion holes

127a and 127b may be formed. This is to prevent misinsertion of the spinous process spacer 10 mounted on the surgical tool 200.

19 illustrates that the diameters of the first insertion hole 127a and the second insertion hole 127b are different from each other. However, this is merely illustrative, and the shapes of the first and

second insertion holes

127a and 127b may be different. It is also possible to vary the depth. Further, when the first and

second insertion holes

127a and 127b are formed on one side of the wing portion 125, as shown in Fig. 20, in a diagonal direction with respect to the side surface thereof. Can be formed. This is to prevent the spacer 10 from falling off from the surgical tool 200 when the surgical tool 200 is rotated during the procedure through the surgical tool 200 due to restrictions on the operating space.

The separation preventing member 130 is rotatably installed in the operating space 123 of the main body 120. That is, the separation preventing member 130 is a first position (an separation prevention member position illustrated in FIG. 19), which is an insertable position, and a second position (position prevention illustrated in FIG. 17), which is a position which prevents separation of the main body 120. Member positions) are variably installed in the working space 123. Here, the departure preventing member 130 is not locked by a separate locking means in the second position, unlike the departure prevention member (30 in Fig. 1) of the spinous process spacer according to the first embodiment, the reverse direction in the second position The change to the first position is prevented by the

spinous processes

3 and 4 pressing the operating part 131a. The operation unit 131a allows the separation preventing member 130 to be changed from the first position to the second position by the interference with the

spinous processes

3 and 4 during the procedure.

In addition, the departure prevention member 130 is the first departure prevention member 131 and the second departure prevention member 131 which is installed in the working space 123 to be rotated in the opposite direction when the variable from the first position to the second position. ) May be included. The first departure preventing member 131 includes a first departure preventing part 133 to prevent the main body 120 from being separated from the second position.

The second departure preventing member 141 is installed in the working space 123 so as to be symmetrical with respect to the first departure preventing member 131, and the second departure preventing part for preventing the departure of the main body 120 in the second position ( 143).

Each of the first and second

departure preventing parts

133 and 143 may be tapered as shown in FIGS. 16, 17 and 19 to facilitate insertion between the

spinous processes

3 and 4 at the first position. Can be formed.

In addition, the fastening holes 131b at predetermined positions of the first and second

departure preventing members

131 and 141 and the main body 121 corresponding to the rotation centers of the first and second

departure preventing members

131 and 141, respectively. , 141b and 123a, and by coupling the pins 129 to the

fastening holes

131b, 141b and 123a, respectively, the first and second

release preventing members

131 and 141 to the main body 120. It can be fastened rotatably. In this case, the pin 129 may be formed of a titanium material so as to function as a marker. It is also possible to couple the screws instead of the pins 127.

In addition, the spinous process spacer 110 according to the embodiment of the present invention further includes a bending member (see 50 in FIG. 7) for bending the spacer 110 to the

spinous processes

3 and 4 at the second position (FIG. 18). It may include. To this end, bending

grooves

125a, 133a, and 143a are formed in each of the wing portions 125 and the separation preventing member 130 of the main body 120, and the bending

grooves

125a, 133a, and 143a are formed. By using the bending member 50 to be bent through, the spacer 110 inserted between the

spinous processes

3 and 4 may be bent. Here, the bending groove 125a formed in the wing portion 125 is perpendicular to the wing portion 125 as shown in FIG. 19 to secure a space for inserting the bending member 50 during the procedure. It may be formed in a straight line.

As described above, by forming the shape of the separation portion anatomically similar to the shape of the spine, it is possible to prevent the fracture of the spine due to load pull by the spacer during the spinous process during the procedure.

In addition, in forming the surgical tool insertion hole for inserting the surgical tool, there is an advantage that can prevent the insertion of the spinous process spacers, and also prevent the fallout spacer from the surgical tools during the procedure.

The above embodiments are merely exemplary, and various modifications and equivalent other embodiments are possible to those skilled in the art. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the invention described in the claims below.

Claims

In the spinous process spacer inserted between neighboring spinous processes to suppress stenosis between the spinous processes,

A main body having a spacing portion spaced apart from the spinous process by a predetermined interval, and a wing portion provided on one side of the spacing portion to prevent separation of the spacing portion, and a predetermined working space formed on the other side of the spacing portion;

And a release preventing member in the operating space variably between a first position which is an insertable position and a second position which is a position which prevents the departure of the main body.
The method of claim 1,

The separation preventing member,

And an actuating part configured to vary from the first position to the second position by interference with the spinous process when inserted between the spinous processes.
The method of claim 1,

The separation preventing member,

And a first and second release preventing member installed in the working space to rotate in opposite directions when the first position is varied from the first position to the second position.
The method of claim 3,

The first separation preventing member,

A first departure preventing part for preventing the main body from being separated from the second position; A first interlocking portion interlocked with the second separation preventing member; It includes a first locking portion for locking the first release preventing portion in the second position,

The second departure preventing member,

A second departure preventing portion preventing the departure of the main body at the second position; A second interlocking unit interlocked with and interlocked with the first interlocking unit; And a second locking portion for locking the second departure preventing portion at the second position.
The method of claim 4, wherein

An end portion of at least one of the first release preventing portion and the second release preventing portion, wherein the spinous process spacer, characterized in that formed in the tapered to facilitate insertion between the spinous process in the first position.
The method of claim 4, wherein

Each of the first interlocking portion and the second interlocking portion is a spinous process spacer, characterized in that made of gears that are geared to each other.
The method of claim 4, wherein

In the second position, the first locking portion and the second locking portion spacers, characterized in that the hooking between each other.
The method of claim 4, wherein

In the second position, at least one of the first locking portion and the second locking portion of the spinous process spacer, characterized in that the hook coupling or ratchet coupling with respect to the main body.
The method of claim 4, wherein

At the second position, at least one of the first locking portion and the second locking portion is a spinous process spacer, characterized in that the screwed to the body.
The method of claim 1,

The width of the spacer in the spinous process transverse direction, the spinous process spacer, characterized in that the tapered so as to gradually narrow toward the end direction of the spinous process toward the spinous body.
The method according to any one of claims 1 to 10,

The spaced portion of the main body is made of a polyether ether ketone (PEEK) material,

At least one of the wing portion and the separation preventing member of the main body spacers, characterized in that made of PEEK or titanium material.
The method according to any one of claims 1 to 10,

The main body and the separation preventing member is formed with a bending portion,

And a bending member which bends against the spinous process through the bending part at the second position.
The method of claim 12,

The bending member is a spinous process spacer, characterized in that made of polyester (Polyester) material.
The method according to any one of claims 1 to 10,

At least one of the spaced apart portion, the wing portion, and the separation preventing member includes a spike portion formed at a portion opposite to the spinous process, the spinous process characterized in that to increase the fixing force between the spinous process Spacer.
The method according to any one of claims 1 to 10,

Surgical tool insertion hole is a spinous process spacer, characterized in that formed in the wing portion of the body.
The method of claim 15,

As the surgical tool insertion hole, the wing portion is spaced apart by a predetermined interval in the vertical direction of the wing portion and is formed with first and second insertion holes different in at least one of a shape and a size, so as to misinsert the surgical tool. The spinous process spacer, characterized in that it is possible to prevent.