A kind of internal fixation of spine device
Technical field
The present invention relates to technical field of medical instruments, particularly relate to a kind of internal fixation of spine device.
Background technology
In recent years, along with the development of spinal biomechanics research and material science, to such an extent as to the internal fixation of spine technology has obtained extensive use in operative treatments such as spinal column degenerative disease, tumor of spine, the infection of wound spinal column.
The apparatus that the internal fixation of spine operation is used comprises internal fixation of spine device and rod.Earlier the internal fixation of spine device is fixed on the vertebral body, again rod is installed on the internal fixation of spine device, make internal fixation of spine device and excellent relative fixed.Operation spinal column inner fixing device moves, and vertebral body is moved, and realizes the orthopedic of vertebral body resetted.
Please refer to Fig. 1, Fig. 1 is a kind of typical internal fixation of spine device and the structural representation of rod, and Fig. 2 is the structural representation of internal fixation of spine device shown in Figure 1, and Fig. 3 is the side view of internal fixation of spine device shown in Figure 2.
Nail body 1` is installed in the vertical through holes of nail seat 2`, and nail body 1` can be around the axis rotation of himself, and the thread segment of nail body 1` lower end is implanted vertebral body, and excellent 3` passes vertical hole 21` of nail seat 2` successively, and the trend of excellent 3` is the trend of spinal column.
Nail body 1` is assemblied in the nail seat 2` through sphere cover 6`, and spherical cover 6` upside assembles secondary gear piece 5` and locking nut 4` successively, and the adjustable angle of spherical cover 6` makes its axis normal in vertical hole 21`, and its place plane parallel is in the axis of excellent 3`.
Regulate the internal fixation of spine device, can realize resetting of vertebral body, the vertebral body that resets is fixed, can make vertebral body recover its original curve.But in the practical operation, after the internal fixation of spine device resetted, in locking nut 4` fixation process, can produce resets lost, and made vertebral body not recover its original curve fully, and reset effect is bad.
Therefore, how reducing internal fixation of spine device resetting in the reset operation process and lose, make vertebral body obtain orthopedic preferably reset effect, is that those skilled in the art are badly in need of the technical problem that solves at present.
Summary of the invention
The purpose of this invention is to provide a kind of internal fixation of spine device, this internal fixation of spine device can be eliminated resetting in the locking process and lose, and vertebral body can obtain reset effect preferably.
In order to realize above-mentioned technical purpose; The invention provides a kind of internal fixation of spine device, comprise nail body, locking nut, connecting plate and slide block, said connecting plate has elongated slot; Said slide block has through hole, and said slide block cooperates with said connecting plate and can move along said elongated slot; Said nail body passes said through hole and said elongated slot; Said locking nut is threaded with said nail body, and said nail body is located by said locking nut.
Preferably, the both sides of the elongated slot of said connecting plate have Ka Tai, and said Ka Tai distributes along two long limits of said elongated slot, and the two ends of said slide block have the fixture block that cooperates with said Ka Tai.
Preferably, the faying face of said slide block and said connecting plate is an arc surface, and the faying face of said nail body and said slide block or said connecting plate also is an arc surface.
Preferably, the through hole of said slide block is an elliptical aperture, the axis of said long axis of ellipse and said elongated slot.
Preferably, said slide block is positioned at said connecting plate downside; The upside of said connecting plate has groove, and the downside of said locking nut has the boss with said groove fit.
Preferably, said slide block is positioned at said connecting plate upside, and the upside of said slide block has groove, and said locking nut has the boss with said groove fit.
Preferably, also comprise the afterbody pipe, said afterbody pipe and said nail body removably connect.
Preferably, said nail body is connected with said afterbody gas thread, and the vertical female thread of said nail body is connected with said afterbody pipe, and external screw thread is connected with said locking nut.
Preferably, said nail body and said afterbody pipe are hollow structure.
Preferably, two said nail bodies are set at least in the elongated slot of said connecting plate.
The invention provides a kind of internal fixation of spine device, comprise nail body, locking nut, connecting plate and slide block, connecting plate has elongated slot, and slide block has through hole, and slide block cooperates with connecting plate and can move along elongated slot; The nail body passes through hole and elongated slot; Locking nut is threaded with the nail body, and the nail body is located by locking nut.
When carrying out the vertebral body reset operation, the nail body of internal fixation of spine device is implanted vertebral body, the nail body passes slide block and connecting plate; Slide block can move along the elongated slot of connecting plate; Realize the adjusting that resets of nail body, then by locking nut locking nail body, in the locking process; Because the through hole of slide block can not produce to reset and lose the restriction of nail body position.The internal fixation of spine device of this structure has been eliminated resetting in the locking process and has been lost, and vertebral body can obtain reset effect preferably.
In a kind of mode, the both sides of the elongated slot of said connecting plate have Ka Tai, and said Ka Tai distributes along two long limits of said elongated slot, and the two ends of said slide block have the fixture block that cooperates with said Ka Tai.
Slide block is cooperated with the Ka Tai of connecting plate by the fixture block at its two ends, and slide block is realized along the relative slip of moving by fixture block and Ka Tai of elongated slot.
Concrete, the through hole of said slide block is an elliptical aperture, the axis of said long axis of ellipse and said elongated slot.
The nail body passes the through hole of slide block, and the nail body can carry out position adjustments at the long axis direction of elliptical aperture, has realized the lateral adjustments of internal fixation of spine device.
In a kind of embodiment, said slide block is positioned at said connecting plate downside; The upside of said connecting plate has groove, and the downside of said locking nut has the boss with said groove fit.
The nail body passes the through hole of slide block earlier, passes the elongated slot of connecting plate again, and then by locking nut locking, the groove fit of the downside of locking nut and connecting plate upside realizes fixing.
In the another kind of embodiment, said slide block is positioned at said connecting plate upside, and the upside of said slide block has groove, and said locking nut has the boss with said groove fit.
The nail body passes the elongated slot of connecting plate earlier, passes the through hole of slide block again, and then by locking nut locking, the groove fit of the downside of locking nut and slide block upside realizes fixing.
In the another kind of mode, also comprise the afterbody pipe, said afterbody pipe and said nail body removably connect.Nail body with afterbody pipe is longer, conveniently carries out implant procedure and reset operation, after the nail body is fixing, can take off the afterbody pipe.
Concrete, said nail body can be threaded with said afterbody pipe, and the vertical female thread of then said nail body is connected with said afterbody pipe, and external screw thread is connected with said locking nut.
In a kind of preferred mode, two said nail bodies are set at least in the elongated slot of said connecting plate.
Carry out vertebral body when resetting, the quantity of the nail body of confirming according to the concrete condition of vertebral body to implant, the quantity of the nail body that promptly is provided with in the elongated slot of connecting plate.
Description of drawings
Fig. 1 is the structural representation of a kind of typical internal fixation of spine device and rod;
Fig. 2 is the structural representation of internal fixation of spine device shown in Figure 1;
Fig. 3 is the side view of internal fixation of spine device shown in Figure 2;
Fig. 4 is the structural representation of a kind of specific embodiment of internal fixation of spine device provided by the present invention;
Fig. 5 is the side view cutaway drawing of internal fixation of spine device shown in Figure 4;
Fig. 6 is the connecting plate of internal fixation of spine device shown in Figure 4 and the structural representation of a kind of specific embodiment of slide block;
Fig. 7 is the connecting plate shown in Figure 6 and the vertical view of slide block;
Fig. 8 is the structural representation of a kind of specific embodiment of locking nut of internal fixation of spine device shown in Figure 4.
The specific embodiment
Core of the present invention provides a kind of internal fixation of spine device, and this internal fixation of spine device can be eliminated resetting in the locking process and lose, and vertebral body can obtain reset effect preferably.
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with the accompanying drawing and the specific embodiment.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of a kind of specific embodiment of internal fixation of spine device provided by the present invention, and Fig. 5 is the side view cutaway drawing of internal fixation of spine device shown in Figure 4.
In a kind of concrete embodiment; The invention provides a kind of internal fixation of spine device; Comprise nail body 1, locking nut 2, connecting plate 3 and slide block 4; Said connecting plate 3 has elongated slot 31, and said slide block 4 has through hole 41, and said slide block 4 cooperates with said connecting plate 3 and can move along said elongated slot 31; Said nail body 1 passes said through hole 41 and said elongated slot 31; Said locking nut 2 is threaded with said nail body 1, and said nail body 1 is by said locking nut 2 location.
When carrying out the vertebral body reset operation, the nail body 1 of internal fixation of spine device is implanted vertebral body, nail body 1 passes slide block 4 and connecting plate 3; Slide block 4 can move along the elongated slot 31 of connecting plate 3; Realize the adjusting that resets of nail body 1, then by locking nut 2 locking nail bodies 1, in the locking process; Because the restriction of 41 pairs of nails of the through hole of slide block 4 body, 1 position can not produce to reset and lose.The internal fixation of spine device of this structure has been eliminated resetting in the locking process and has been lost, and vertebral body can obtain reset effect preferably.
Please refer to Fig. 6 and Fig. 7, Fig. 6 is the connecting plate of internal fixation of spine device shown in Figure 4 and the structural representation of a kind of specific embodiment of slide block, and Fig. 7 is the connecting plate shown in Figure 6 and the vertical view of slide block.
In the further concrete embodiment, the both sides of the elongated slot 31 of said connecting plate 3 have card platform 32, and said card platform 32 distributes along two long limits of said elongated slot 31, and the two ends of said slide block 4 have the fixture block 42 that cooperates with said card platform 32.
Slide block 4 is cooperated with the card platform 32 of connecting plate 3 by the fixture block 42 at its two ends, and slide block 4 is realized along moving by the relative slip of fixture block 42 with card platform 32 of elongated slot 31.Card platform 32 is equivalent to be arranged on the track in the outside, 31 liang long limits of elongated slot, and when fixture block 42 slided along card platform 32, promptly slide block 4 moved along elongated slot 31.
Fixture block 42 can be set to version as shown in Figure 6 with card cooperating of platform 32; Can also be set to the structure that fixture block 42 embeds the card platform 32 of rail mounted; Certainly; Fixture block 42 not only is confined to aforesaid situation with the version that matches of card platform 32, and other versions of can relative engagement sliding also can be used in the present invention.
Concrete, said slide block 4 is an arc surface with the faying face of said connecting plate 3, said nail body 1 also is an arc surface with the faying face of said slide block 4 or said connecting plate 3.
Contacted faying face is arc surface among nail body 1, connecting plate 3 and slide block 4 threes, makes nail body 1 have degree of freedom preferably, can rotating certain angle, and the adjusting of position during convenient nail body 1 resets.
Preferably, the through hole 41 of said slide block 4 is an elliptical aperture, the axis of said long axis of ellipse and said elongated slot 31.
Nail body 1 passes the through hole 41 of slide block 4, and when through hole 41 was elliptical aperture, nail body 1 can carry out position adjustments at the long axis direction of elliptical aperture, has realized the lateral adjustments of internal fixation of spine device.
Need to prove that the direction of the major axis of elongated slot 31 is vertically, vertically is the trend of spinal column; With the direction of the axis of elongated slot 21 be laterally, laterally perpendicular to the trend of spinal column.Slide block 4 cooperates with connecting plate 3 makes vertebral body both realize that vertical adjusting had also realized lateral adjustments.
Please refer to Fig. 8, Fig. 8 is the structural representation of a kind of specific embodiment of locking nut of internal fixation of spine device shown in Figure 4.
In a kind of concrete embodiment, said slide block 4 is positioned at said connecting plate 3 downsides; The upside of said connecting plate 3 has groove 33, and the downside of said locking nut 2 has the boss 21 that cooperates with said groove 33.
Nail body 1 passes the through hole 41 of slide block 4 earlier, passes the elongated slot 31 of connecting plate 3 again, and by locking nut 2 lockings, the boss 21 of the downside of locking nut 2 cooperates with the groove 33 of connecting plate 3 upsides then, realizes fixing.
In the another kind of concrete embodiment, said slide block 4 is positioned at said connecting plate 3 upsides, and the upside of said slide block 4 has groove, and said locking nut 2 has the boss 21 with said groove fit.
Nail body 1 passes the elongated slot 31 of connecting plate 3 earlier, passes the through hole 41 of slide block 4 again, and then by locking nut 2 lockings, the boss 21 of the downside of locking nut 2 and the groove fit of slide block 41 upsides are realized fixing.
The boss 21 of locking nut 2 can be sphere shape, spherical and above-mentioned groove fit, and contacted faying face has been realized being locked between the two.Certainly, locking nut 2 also can be other structures with the faying face of groove.
A kind of preferred embodiment in, also comprise afterbody pipe 5, said afterbody pipe 5 removably connects with said nail body 1.
The nail body 1 that is connected with afterbody pipe 5 is longer, and is more convenient when vertebral body is carried out implant procedure and reset operation, will follow closely body 1 fixing after, can take off afterbody pipe 5, in the time of need adjusting nail body 1, can again afterbody pipe 5 be installed on the nail body 1.
Further in the embodiment, said nail body 1 is threaded with said afterbody pipe 5, and said nail body 1 vertical female thread is connected with said afterbody pipe 5, and external screw thread is connected with said locking nut 2.
Obviously, nail body 1 is not limited only to be threaded with the connected mode of afterbody pipe 5, and the connected mode of other convenient disassemblies also can be used in the present invention, for example clamp connection.
Further in the specific embodiment, said nail body 1 is hollow structure with said afterbody pipe 5.
Nail body 1 and afterbody pipe 5 can be hollow structure satisfying on himself hardness intensity based, can reduce the weight of internal fixation of spine device like this, have reduced to impose on the gravity of the internal fixation of spine device self of vertebral body, help resetting of vertebral body.
To above-mentioned each embodiment, two said nail bodies 1 are set at least in the elongated slot 31 of said connecting plate 3.
Carry out vertebral body when resetting, the quantity of the nail body of confirming according to the concrete condition of vertebral body to implant 1, the quantity of the nail bodies 1 that promptly are provided with in the elongated slot 31 of connecting plate 3 has also been confirmed the length of connecting plate 3.
In order to help resetting of vertebral body, connecting plate 3 has certain radian usually, and the radian of connecting plate 3 can be set to any position of spinal column all can be general, also can be to the special connecting plate 3 with specific arc that is provided with of the needs of spinal column particular location.
In the application of reality, implant all nail bodies 1 of vertebral body and can fix with same connecting plate 3, a plurality of connecting plates 3 also can be set, make at a distance of nearer nail body 1 a shared connecting plate 3.
More than internal fixation of spine device provided by the present invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.