CN2537355Y

CN2537355Y - posterior spinal fixator

Info

Publication number: CN2537355Y
Application number: CN 02206324
Authority: CN
Inventors: 章本华; 刘建麟; 陈弘毅; 吴志明; 萧乾道; 周圣行; 赵伟泰
Original assignee: Mercer Medical Equipment Co ltd; Industrial Technology Research Institute ITRI
Current assignee: Mercer Medical Equipment Co ltd; Industrial Technology Research Institute ITRI
Priority date: 2002-02-25
Filing date: 2002-02-25
Publication date: 2003-02-26
Anticipated expiration: 2012-02-25

Abstract

The utility model provides a rear vertebra internal fixation ware, it is by a link mechanism, the subassembly is implanted to the multiunit, fill up and connect the subassembly and lock the subassembly outward and constitute, with a plurality of implant subassembly solid lock in the vertebra internal, then cup joint a link mechanism in this implant subassembly top, assemble corresponding pad according to the preface again and connect subassembly and lock the subassembly outward, borrow the locking effect of external lock subassembly and implant subassembly at last, can be with the vertebra centrum that receives wound or pathological change and whole fixer one-tenth an organic whole, reach complete fixed effect.

Description

Rear vertebra inner fixer

Technical field

This utility model relates to a kind of rear vertebra inner fixer, design optimization by mechanical analysis, make its assembly after doing suitable dimension reduction, still can have enough intensity and fatigue durability, and by modularized design, making it is being when being subjected to the vertebra vertebral body fixing holder of wound or pathological changes, can carry out the adjustment of span and angle, and the vertebra vertebral body is fixed on best situation, to improve the effect of correcting rehabilitation.

Background technology

Modern regular meeting is because of year in year out sitting posture or sleeping position is bad, the generation of the motion mode of mistake or other unexpected situation; and cause the vertebra vertebral body to come to harm or produce retrograde affection; for improving the influence that the vertebra vertebral deformation is caused patient's work and rest; must be via surgical operation; adjusted fixing with being subjected to the vertebra vertebral body of wound or generation pathological changes; cooperate follow-up rectification work of rehabilitation again, make whole piece or partial vertebra vertebral body structure, can recover normal condition.

Under the prerequisite of considering ergonomics and structural strength, can design suitable vertebra fixer, its implantation is subjected in the vertebra vertebral body of wound or generation pathological changes, and according to the situation of patient's vertebra, adjust suitable span and angle, whole holder and vertebra cone shape are integral, reach the effect that is completely fixed.

For avoiding holder that patient's activity is brought inconvenience, it is better little to heal in the overall dimensions design of holder, and the height that will protrude in vertebra vertebral body outside is reduced to minimum, but in size reduction, must guarantee that still each assembly of holder has enough intensity and fatigue durability, prevent from the patient to be caused two degree injuries because of assembly damages or ruptures.

Secondly need to consider the convenience of operation technique, because having the nerve of many complexity to concentrate, human body is distributed in the vertebra rear side, make the surgical operation difficulty at this position increase, so must effectively reduce the quantity of fixation kit, to simplify operating procedure, to shorten operation time, improve the safety of operation.

In addition,, and there is certain diversity because be subjected to wound or the pathological changes situation of vertebra vertebral body can be because of the patient or the differences at position, thus in the design of holder, must make span and angle can do the elasticity adjustment, fully to satisfy the user demand of various situations.

Technical scheme

Main purpose of the present utility model is to solve the above problems, and avoids the existence of the problems referred to above, and this utility model provides a kind of rear vertebra inner fixer, the height that protrudes in vertebra vertebral body outside effectively can be reduced.

Another purpose of the present utility model provides a kind of rear vertebra inner fixer, and the assembly of this holder is doing can have enough intensity and fatigue durability under the situation of design optimization via mechanical analysis.

Another purpose of the present utility model provides a kind of rear vertebra inner fixer, effectively reduces fixation kit quantity, and adopts and from bottom to top assemble in regular turn and fixed mode, makes operation technique more easy.

Another purpose of the present utility model provides a kind of rear vertebra inner fixer, and the span of this holder and angle can be done the elasticity adjustment according to situation.

For realizing above-mentioned purpose, this utility model with a connect mechanism, organize implant assembly more, pad connected components and outer lock set constitute a rear vertebra inner fixer, lock set outside the many groups of connect mechanism binding implant assemblies, pad connected components reach, and span and angle done suitable adjustment, utilize the locking effect of outer lock set and implant assembly at last, will be completely fixed by the vertebra vertebral body of wound or pathological changes.

Relevant detailed description of the present utility model and technology contents, existing conjunction with figs. is described as follows.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a section of structure of the present utility model.

Fig. 3 is an assembled perspective view of the present utility model.

Fig. 4 is the first embodiment sketch map of the present utility model.

Fig. 5 is another pattern connect mechanism sketch map of the present utility model.

Fig. 6 is another pattern connect mechanism profile of the present utility model.

Fig. 7 is the second embodiment sketch map of the present utility model.

Fig. 8 is another pattern implant assembly of the present utility model and outer lock set sketch map.

Fig. 9 is another pattern implant assembly of the present utility model and outer lock set profile.

Figure 10 is the 3rd an embodiment sketch map of the present utility model.

Figure number explanation in the accompanying drawing:

Implant assembly ... ..1 implants screw thread ... ..11

External lock screw thread ... ..12 bulge loop ... .13

Connect mechanism ... ..2 narrow hole ... 21

The recessed edge of dome shape ... .22

Pad connected components ... ..3 through hole ... .31

Outer lock set ... ..4 screw ... .41

Connection assembly ... ..51 first through hole ... ..511

The recessed edge of sphere ring-type ... 512 second through holes ... ..513

Fixing threaded hole ... ..514

Uiform section rod member ... .52 fixed screw ... ..53

Spheroform surface ... ..6 winding plane ... ..7

Vertebra vertebral body ... ..8

The specific embodiment

As shown in Figure 1, be structural representation of the present utility model, this rear vertebra inner fixer is made up of many groups implant assembly 1, pad connected components 3, outer lock set 4 and a connect mechanism 2.

This implant assembly 1, connect mechanism 2, pad connected components 3 and outer lock set 4 can be formed in one or processing and manufacturing forms.

This implant assembly 1 and connect mechanism 2 can carry out design optimization via mechanical analysis, to have enough intensity and fatigue durability.

As Fig. 2, shown in Figure 3, be section of structure of the present utility model and assembled perspective view, this implant assembly 1, it is a cylinder, the one end has the implantation screw thread 11 of a suitable length, be used for implant assembly 1 is locked in vertebra vertebral body 8 admittedly, the shape of this implantation screw thread 11 can be one can reduce the cone of locking resistance admittedly, the external lock screw thread 12 that has a suitable length with respect to the other end of this implantation screw thread 11, has a bulge loop 13 between two screw threads, these bulge loop 13 outer rims can have a plurality of tangent planes of the convenient rotation application of force, and its side in this external lock screw thread 12 is a spheroform surface 6.

This connect mechanism 2, it is a narrow shape plate, it has two planes that are parallel to each other, have a plurality of and the vertical suitable length narrow hole 21 in plane along this planar longitudinally, be used to be socketed in the external lock screw thread 12 of this implant assembly 1, and have the appropriate gap that can make this implant assembly 1 adjust angle with these external lock screw thread 12 edges.

This narrow hole 21 is positioned at planar two ora terminalis, and one of them has the recessed edge 22 of a plurality of dome shape at least, makes the implant assembly 1 that is arranged in this narrow hole 21, can be according to the orientation adjustment of vertebra vertebral body 8 to suitable position and angle.

When two ora terminalis of this narrow hole 21, when all having the recessed edge 22 of dome shape, the recessed edge 22 of this dome shape has mutual corresponding relation in two planar positions.

When two ora terminalis of this narrow hole 21, when only one of them had the recessed edge 22 of dome shape, the implant assembly 1 that it disposed had bigger angle adjustable scope.

This connect mechanism 2 can be bent into required arc according to the shape of vertebra vertebral body 8 when assembling.

This fills up connected components 3, its center has a suitably big or small through hole 31, be used to be socketed in the external lock screw thread 12 that wore this narrow hole 21, and has the appropriate gap that can make this implant assembly 1 adjust angle with these external lock screw thread 12 edges, end face in this connect mechanism 2 is a spheroform surface 6, is a winding plane 7 with respect to the other end of this spheroform surface 6.

The recessed edge 22 of the dome shape of this connect mechanism 2 has the identical sphere curvature of spheroform surface 6 with implant assembly 1 and pad connected components 3, makes the angle of this implant assembly 1 with respect to this connect mechanism 2, can adjust according to the orientation of vertebra vertebral body 8.

Should outer lock set 4, be a cylinder, its outer rim can have the convenient a plurality of tangent planes that rotate the application of force, and the center has a screw 41, is screwed together in the external lock screw thread 12 of this implant assembly 1, is a winding plane 7 in an end face of this pad connected components 3.

As shown in Figure 4, be the first embodiment sketch map of the present utility model, the implantation screw thread 11 of a plurality of implant assemblies 1 is locked in the vertebra vertebral body 8 admittedly, socket connect mechanism 2, pad connected components 3 reach outer lock set 4 in the external lock screw thread 12 of this implant assembly 1 in regular turn then, at last with outer lock set 4 lockings, so will organize implant assembly 1, pad connected components 3 and outer lock set 4 by connect mechanism 2 links and fixes more, can will be subjected to the vertebra vertebral body 8 of wound or pathological changes to form one, reach the effect that is completely fixed with whole holder.

As Fig. 5, shown in Figure 6, be another pattern connect mechanism sketch map and profile of the present utility model, this connect mechanism includes: a plurality of connection assemblies 51, a prismatic member spare 52 and a plurality of fixed screw 53.

This connection assembly 51, it is a microscler plate, it has two planes that are parallel to each other, this planar end has first through hole 511 perpendicular to this in-plane, be used to be socketed in the external lock screw thread 12 of this implant assembly 1, and has the appropriate gap that can make this implant assembly 1 adjust angle with these external lock screw thread 12 edges, this first through hole 511 is positioned at planar two ora terminalis and has the recessed edge 512 of a sphere ring-type respectively, with respect to the other end of this first through hole 511 have one with this parallel plane second through hole 513, have one corresponding to the wherein plane of these second through hole, 513 positions and protrude the position, this protrusion position has one and is through to the fixing threaded hole 514 of second through hole 513 by the surface.

The recessed edge 512 of this sphere ring-type has the identical sphere curvature of spheroform surface 6 with this implant assembly 1 and pad connected components 3, and this implant assembly 1 can be adjusted according to the orientation of vertebra vertebral body 8 with respect to the angle of this connection assembly 51.

This prismatic member spare 52 is the modularized design of replaceable different length, can select the uiform section rod member 52 of suitable length according to the span of vertebra vertebral body 8 for use.

This fixed screw 53 is used for this prismatic member spare 52 is fixed in second through hole 513 of this connection assembly 51, and it has the screw thread that the fixing threaded hole 514 with this connection assembly 51 is complementary.

As shown in Figure 7, be the second embodiment sketch map of the present utility model, the implantation screw thread 11 of a plurality of implant assemblies 1 is locked in the vertebra vertebral body 8 admittedly, socket connection assembly 51 in regular turn then, pad connected components 3 and outer lock set 4 are in the external lock screw thread 12 of this implant assembly 1, and uiform section rod member 52 is arranged in second through hole 513 of this connection assembly 51, at last with outer lock set 4 and fixed screw 53 lockings, so will organize implant assembly 1 by uiform section rod member 52 more, connection assembly 51, pad connected components 3 and outer lock set 4 link fixing, can will be subjected to the vertebra vertebral body 8 of wound or pathological changes to form one, reach the effect that is completely fixed with whole holder.

As Fig. 8, shown in Figure 9, be another pattern implant assembly of the present utility model and outer lock set sketch map and profile, this implant assembly 1, it is a cylinder, the one end has the implantation screw thread 11 of a suitable length, be used for implant assembly 1 is locked in vertebra vertebral body 8 admittedly, the shape of this implantation screw thread 11 can be one can reduce the cone of locking resistance admittedly, the external lock screw thread 12 that has a suitable length with respect to the other end of this implantation screw thread 11, has a bulge loop 13 between two screw threads, these bulge loop 13 outer rims can have a plurality of tangent planes of the convenient rotation application of force, and its side in this external lock screw thread 12 is a winding plane 7.

Should outer lock set 4, be a cylinder, its outer rim can have the convenient a plurality of tangent planes that rotate the application of force, and the center has a screw 41, is screwed together in the external lock screw thread 12 of this implant assembly 1, is a spheroform surface 6 in an end face of this connect mechanism 2.

Spheroform surface 6 that should outer lock set 4 has the identical sphere curvature of the recessed edge of dome shape with this connect mechanism 2 22, and this implant assembly 1 can be adjusted according to the orientation of vertebra vertebral body 8 with respect to the angle of this connect mechanism 2.

As shown in figure 10, be the 3rd embodiment sketch map of the present utility model, the implantation screw thread 11 of a plurality of implant assemblies 1 is locked in the vertebra vertebral body 8 admittedly, overlap connection pad connected components 3, connect mechanism 2 and outer lock set 4 then in regular turn in the external lock screw thread 12 of this implant assembly 1, at last with outer lock set 4 lockings, so will organize implant assembly 1, pad connected components 3 and outer lock set 4 by connect mechanism 2 links and fixes more, can will be subjected to the vertebra vertebral body 8 of wound or pathological changes to form one, reach the effect that is completely fixed with whole holder.

Claims

1. A rear spinal internal fixator, comprising a plurality of implant components (1), a connecting mechanism (2) and a plurality of external locking components (4), characterized in that:

The implant component (1) is a cylinder, one end of which has an implant thread (11) of appropriate length, and the other end of the implant thread (11) has an external locking thread (12) of appropriate length. There is a protruding ring (13) between the threads, and the protruding ring (13) is a spherical curved surface (6) on one side of the external locking thread (12); the connecting mechanism (2) is arranged on the external locking thread (12); and the plurality of external locking components (4), configured above the connecting mechanism (2), and the external locking component (4) is a cylinder with a screw hole (41) in its center, Screwed to the external locking thread (12) of the implant component (1), one end surface of the connecting mechanism (2) is a spherical plane; multiple implant components (1) are locked in the vertebral body (8) , and then assemble the connecting mechanism (2) and the outer locking component (4) in sequence, and finally, through the locking effect of the outer locking component (4) and the implanted component (1), the injured or diseased vertebral body can be (8) It is integrated with the whole fixer to achieve the effect of complete fixation.

2. The rear spinal internal fixator according to claim 1, characterized in that: the connecting mechanism (2) can be a narrow plate, which has two planes parallel to each other, and a plurality of planes along the longitudinal direction of the plane. A narrow hole (21) of appropriate length perpendicular to the plane is sleeved on the external locking thread (12) of the above-mentioned implant component (1). The narrow hole (21) is located at the two end edges of the plane, at least one of which has A plurality of spherical concavities (22).

3. The posterior spinal internal fixator according to claim 2, characterized in that: the connecting mechanism (2) can be bent into a required arc according to the shape of the spine.

4. The rear spinal internal fixator according to claim 2, characterized in that: after the narrow hole (21) is sleeved on the external locking thread (12) of the above-mentioned implant assembly (1), its edge and the Appropriate clearances are provided between the external locking threads (12).

5. The rear spinal internal fixer according to claim 2, characterized in that: the spherical concave edge (22) of the narrow hole (221) has the same spherical surface (6) as the implant assembly (1). spherical curvature.

6. The rear spinal internal fixator according to claim 1, characterized in that, the connecting mechanism (2) may include:

A plurality of connecting components (51), the connecting component (51) is an elongated plate, which has two planes parallel to each other, one end of the two planes has a first through hole (511) perpendicular to the direction of the plane, and the sleeve Connected to the external locking thread (12) of the above-mentioned implant component (1), the two end edges of the first through hole (511) on the plane respectively have a spherical annular concave edge (512), relative to the first through hole ( The other end of 511) has a second through hole (513) parallel to the above-mentioned plane, and one of the planes corresponding to the position of the second through hole (513) has a protruding part, and the protruding part has a surface penetrating to the fixing screw hole (514) of the second through hole (513);

A first-class cross-section rod (52), pierced through the second through hole (513) of the connecting component (51); and

A plurality of fixing screws (53) are arranged in the fixing screw holes (514) of the connecting component (51).

7. The rear spinal internal fixator according to claim 6, characterized in that: after the first through hole (511) is sleeved on the external locking thread (12) of the above-mentioned implant assembly (1), its edge and Appropriate clearances are provided between the external locking threads (12).

8. The rear spinal internal fixator according to claim 6, characterized in that: the spherical annular concave edge (512) of the first through hole (511) and the spherical curved surface (6) of the implant assembly (1) have same spherical curvature.

9. The posterior spinal internal fixator according to claim 6, characterized in that: the equal-section rod (52) is a modular design that can replace different lengths.

10. The posterior spinal internal fixator according to claim 1, characterized in that: the outer locking component (4) can be socketed with a cushioning component (3) to form the spherical plane, and the cushioning component (3) , which has a through hole (31) of appropriate size in its center to be socketed on the implant component (1), and one end surface of the connecting mechanism (2) is a spherical curved surface, and the outer locking component (4) of the spherical curved surface The end is a set of connecting planes.

11. The posterior spinal internal fixator according to claim 1, characterized in that: the convex ring (13) of the implant component (1) can be socketed with a pad component (3) to form the spherical plane, the The padding component (3) has a through hole (31) of appropriate size in its center, so as to be sleeved on the implant component (1), and one end surface of the connecting mechanism (2) is a spherical curved surface, and the convex surface relative to the spherical curved surface The ring (13) end is a set of connection planes.