CN201197741Y

CN201197741Y - Bifurcate atlantoaxial hook nail fixator

Info

Publication number: CN201197741Y
Application number: CNU2008200878406U
Authority: CN
Inventors: 胡勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-28
Filing date: 2008-05-28
Publication date: 2009-02-25
Anticipated expiration: 2018-05-28

Abstract

The utility model discloses a dichotomous atlantoaxial hook fixer which comprises at least two vertebra lamina bolts and a vertebra lamina hook component. The vertebra lamina hook component is provided with a hooking piece, a hooking body is arranged on the head end of the hooking piece, and at least two connecting rods are movably connected to the tail end of the hooking piece. The head ends of both the vertebra lamina bolts are movably connected with fixing clamp bodies which are assembled and fixed with the connecting rods. Hooks in the middle are dichotomously arranged, so that the force of the hooks can be transmitted equally to both sides thereof, the stress is even, and the structure is reasonable. By adopting an inserting-rod fastening structure, the utility model has the advantages of convenient installation, strong operability, simple structure, and small striping range during the operation. Furthermore, an assembly structure for a ball head and a ball seat has a universal rotation function, thereby the flexibility of the fixer in application is improved. The internal fixation is safe and reliable and provides a good biomechanics environment for the bony union.

Description

Dichotomous extensive region dentata hook nail holder

Technical field

This utility model relates to the fixed technical field of extensive region dentata, particularly a kind of dichotomous extensive region dentata hook nail holder.

Background technology

Atlantoaxial dislocation and shakiness are comparatively common clinically, easily cause the upper cervical spine compression of spinal cord, often need operative treatment, to remove compressing, to stablize the extensive region dentata.Atlantoaxial dislocation and unstable operative treatment mode being had multiple, mainly is being to carry out articulatio atlantoepistrophica by extensive region dentata LOCATION OF PEDICLE SCREW FIXATION system to fix and rebuild for atlantoaxial dislocation and shakiness medically.But, fix and rebuild that the operating difficulty at this position is big, risk is high so employing extensive region dentata LOCATION OF PEDICLE SCREW FIXATION system carries out articulatio atlantoepistrophica because Atlantoaxial structure is special, neighbouring relationship is complicated, important nerve and blood vessel are arranged on every side.In addition, because the difference between the individuality, some patient is tiny because of the C1-2 pedicle of vertebral arch, can't hold diameter and be 3.5 millimeters screw.Vein in the art between extensive region pivot lateral mass is abundant, and when appearing C1 pedicle of vertebral arch and C2 lateral mass in the art, this venous plexus of easy damaged is hemorrhage, because the art open country is unclear, makes the guide pin of C1 pedicle of vertebral arch and lateral mass screw insert difficulty.

Also having at present the design of adopting nail hook holder in the society, is that the Chinese utility model patent " nail hook holder " (notification number is CN2850539Y) of ZL200520088200.3 is exactly this type of design as the patent No.; Be made of vertebral lamina hook and screw, vertebral lamina hook is a hook-type, and the narrow outward flange of hook groove inward flange of vertebral lamina hook is wide, and vertebral lamina hook top has circular hole; Screw is a cancellous bone screw; Vertebral lamina hook is implemented to fix by screw in this design, and this fixed form is bigger to the control difficulty of position when operation, and the fixing back of screw is difficult for reaching preferably the installation accuracy of vertebral lamina hook; If elder generation is the position of vertebral lamina hook fixedly, it is wayward that then screw is screwed into operation, also cannot say for sure to demonstrate,prove the tension degree of vertebral lamina hook and screw after being equipped with mutually simultaneously, has uncontrollable factor, so it is more to design the shortcoming that exists generally speaking, a little less than the practical application.

Summary of the invention

Technical problem to be solved in the utility model is the present situation at prior art, and a kind of dichotomous extensive region simple in structure, easy to operate, applied widely and safe in utilization, reliable dentata hook nail holder is provided.

This utility model solves the problems of the technologies described above the technical scheme that is adopted: dichotomous extensive region dentata hook nail holder, comprise at least two vertebral plate screws and vertebral plate hanging hook assembly, this vertebral plate hanging hook assembly is equipped with hook spare, hook spare head end is shaped on coupler body, and this hook spare tail end is connected with at least two connecting rods; Vertebral plate screw head end all is connected with retaining clip, and retaining clip is all equipped mutually fixing with connecting rod.

The measure of taking also comprises:

Above-mentioned hook spare tail end is shaped on two braces that extend downwards, is formed with the die cavity body of U-shaped between this brace.

Above-mentioned connecting rod head end is shaped on the connection earrings, and this connection earrings torus that is monolateral press forming; Connecting the earrings lower end is cylindrical bar.

Above-mentioned vertebral plate screw is two, and correspondingly, above-mentioned connecting rod also is two; The connection earrings that connecting rod is shaped on all can be inlaid in the die cavity body.

System first connecting hole correspondingly, also is shaped on second connecting hole that can match with first connecting hole in the middle of the above-mentioned connection earrings on the above-mentioned brace.

Be equipped with connecting pin between the second above-mentioned connecting hole and first connecting hole.

First kind of technical scheme of connecting pin is: above-mentioned connecting pin is a bolt, and the end of thread of this connecting pin stretches out in outside the brace, and is connected with at least one also medicated cap on this end of thread.

Second kind of technical scheme of connecting pin is: above-mentioned connecting pin is a rivet pin, and the two ends of this rivet pin all are positioned at outside the brace.

Above-mentioned retaining clip one end and the bulb ball seat connection mutually of the head end of vertebral plate screw; The other end of retaining clip is fitted with the securing member that can clamp cylindrical bar on the connecting rod.

Be equipped with intermediate gasket between above-mentioned securing member and the connecting rod, this intermediate gasket be shaped on can with the cylindrical bar circular arc button arc groove of joining mutually, and this intermediate gasket is sleeved on the outer ring of retaining clip.

Compared with prior art, this utility model vertebral plate hanging hook assembly is equipped with hook spare, and hook spare head end is shaped on coupler body, and this hook spare tail end is connected with at least two connecting rods; Vertebral plate screw head end all is connected with retaining clip, and retaining clip is all equipped mutually fixing with connecting rod.Advantage of the present utility model is: middle hook, and forked arrangement can be passed to both sides with the hook dynamic balance, and is stressed even, rational in infrastructure; The inserted-link type fastening structure, it is convenient, workable that whole utensil is installed; Simple in structure, the dissection scope during operation is little; The equipped structure of bulb ball seat has the direction rotating function, has improved the motility of using; Internal fixation safety, reliable, provide good biomechanics environment for bony union.

Description of drawings

Fig. 1 is that vertical placement master of this utility model embodiment looks sketch map;

Fig. 2 is the front schematic view of hook spare among Fig. 1;

Fig. 3 is that sketch map is looked on the left side of Fig. 2;

Fig. 4 is that the intermediate gasket among Fig. 1 keeps flat sketch map;

Fig. 5 is the connection diagram of single connecting rod and retaining clip;

Fig. 6 is that sketch map is looked on the left side of Fig. 5;

Fig. 7 is that sketch map is looked on the right side of Fig. 5;

Fig. 8 is the generalized section of Fig. 5.

The specific embodiment

Embodiment describes in further detail this utility model below in conjunction with accompanying drawing.

To embodiment shown in Figure 8, figure grade illustrates: vertebral plate screw 1, vertebral plate hanging hook assembly 2 as Fig. 1, hook spare 21, coupler body 21a, brace 21b, die cavity body 21c, the second connecting hole 21d, connecting rod 22, connect earrings 22a, cylindrical bar 22b, the first connecting hole 22c, connecting pin 23, retaining clip 3, securing member 4, intermediate gasket 5, arc groove 5a.

This utility model embodiment, dichotomous extensive region dentata hook nail holder comprises at least two vertebral plate screws 1 and vertebral plate hanging hook assembly 2, and this vertebral plate hanging hook assembly 2 is equipped with hook spare 21, hook spare 21 head ends are shaped on coupler body 21a, and hook spare 21 tail ends are connected with at least two connecting rods 22; Vertebral plate screw 1 head end all is connected with retaining clip 3, and retaining clip 3 is all equipped mutually fixing with connecting rod 22.

Present embodiment is achieved in that hook spare 21 tail ends are shaped on two brace 21b that extend downwards, are formed with the die cavity body 21c of U-shaped between the brace 21b.Connecting rod 22 head ends are shaped on and connect earrings 22a, and this connection earrings 22a is the torus of monolateral press forming; Connecting earrings 22a lower end is cylindrical bar .22b.

Vertebral plate screw 1 is two, and correspondingly, connecting rod 22 also is two; The connection earrings 22a that connecting rod 22 is shaped on all can be inlaid in the die cavity body 21c, and connection earrings 22a inner face develops simultaneously and packs into during setting-in.

Make the first connecting hole 22c in the middle of connecting earrings 22a, correspondingly, also be shaped on the second connecting hole 21d that can match on the brace 21b, and between the second connecting hole 21d and the first connecting hole 22c, be equipped with connecting pin 23 with the first connecting hole 22c.

Connecting pin 23 can be bolt, and the end of thread of connecting pin 23 of this moment stretches out in outside the brace 21b, and is connected with at least one and medicated cap on this end of thread, by and medicated cap realize connecting pin about fixing.Connecting pin 23 also can be rivet pin, and the two ends of this rivet pin all are positioned at outside the brace 21b, and the jackshaft of rivet pin is equipped with and connects earrings 22a.But the concrete structure of connecting pin 23 is not limited to two kinds of above-mentioned structures, and its structure can be decided according to the applicable cases of reality, structure in any case, and the function of connecting pin 23 is constant, and promptly connecting pin 23 is mainly used in the swing connection of two connecting rods 22.

The head end of retaining clip 3 one ends and vertebral plate screw 1 bulb ball seat mutually connects; The other end of retaining clip 3 is fitted with the securing member 4 that can clamp cylindrical bar 22b on the connecting rod 22.Be equipped with intermediate gasket 5 between securing member 4 and the connecting rod 22, intermediate gasket 5 be shaped on can with the cylindrical bar 22b arc groove 5a that joins of circular arc button mutually, and this intermediate gasket 5 is sleeved on the outer ring of retaining clip 3.

This holder is reasonable in design, and is simple in structure, and member is few, meets the dissect physiology structural requirement of vertebral plate, can play good Stabilization.Its material is a titanium alloy, has excellent biological compatibility, and feasible CT of postoperative and MRI check.

This holder is easy and simple to handle, and dissection scope is little, is difficult for causing spinal cord injury; After placing vertebral plate hanging hook assembly and vertebral plate screw, can finish by direct clamping and to reset and fix.

This holder internal fixation safety, reliable, provide good biomechanics environment for bony union., can adopt dichotomous extensive region dentata hook nail holder, but after the operation reliable neck brace external fixation should be arranged, during for the size of extensive region dentata pedicle isthmus with the rotation brake of restriction postoperative cervical vertebra less than 3.5 millimeters.

Bilateral vertebral artery patient asymmetric or vertebral artery hypoplasia even vertebral artery occlusion should select dichotomous extensive region dentata hook nail holder for use.

At pediatric patient, because the skeleton incomplete development, pedicle of vertebral arch is generally tiny, and it is fixing just more difficult to carry out screw in pedicle of vertebral arch, and danger is bigger, and this part patient selects the dichotomous extensive region dentata hook nail holder particularly necessity that seems for use.

Most preferred embodiment of the present utility model is illustrated, and various variations or the remodeling made by those of ordinary skills can not break away from scope of the present utility model.

Claims

1. dichotomous extensive region dentata hook nail holder, comprise at least two vertebral plate screws (1) and vertebral plate hanging hook assembly (2), described vertebral plate hanging hook assembly (2) is equipped with hook spare (21), described hook spare (21) head end is shaped on coupler body (21a), it is characterized in that: described hook spare (21) tail end is connected with at least two connecting rods (22); Described vertebral plate screw (1) head end all is connected with retaining clip (3), and described retaining clip (3) is all equipped mutually fixing with connecting rod (22).

2. dichotomous extensive region according to claim 1 dentata hook nail holder is characterized in that: described hook spare (21) tail end is shaped on two braces (21b) that extend downwards, is formed with the die cavity body (21c) of U-shaped between the described brace (21b).

3. dichotomous extensive region according to claim 2 dentata hook nail holder is characterized in that: described connecting rod (22) head end is shaped on and connects earrings (22a), and should connection earrings (22a) be the torus of monolateral press forming; Described connection earrings (22a) lower end is cylindrical bar (22b).

4. dichotomous extensive region according to claim 3 dentata hook nail holder, it is characterized in that: described vertebral plate screw (1) is two, correspondingly, described connecting rod (22) also is two; The connection earrings (22a) that described connecting rod (22) is shaped on all can be inlaid in the die cavity body (21c).

5. dichotomous extensive region according to claim 4 dentata hook nail holder, it is characterized in that: system first connecting hole (22c) in the middle of the described connection earrings (22a), correspondingly, also be shaped on second connecting hole (21d) that can match on the described brace (21b) with first connecting hole (22c).

6. dichotomous extensive region according to claim 5 dentata hook nail holder is characterized in that: be equipped with connecting pin (23) between described second connecting hole (21d) and first connecting hole (22c).

7. dichotomous extensive region according to claim 6 dentata hook nail holder, it is characterized in that: described connecting pin (23) is a bolt, and the end of thread of described connecting pin (23) stretches out in outside the brace (21b), and is connected with at least one also medicated cap on this end of thread.

8. dichotomous extensive region according to claim 6 dentata hook nail holder is characterized in that: described connecting pin (23) is a rivet pin, and the two ends of this rivet pin all are positioned at outside the brace (21b).

9. according to claim 7 or 8 described dichotomous extensive region dentata hook nail holders, it is characterized in that: the head end of described retaining clip (3) one ends and vertebral plate screw (1) bulb ball seat mutually connects; The other end of described retaining clip (3) is fitted with and can clamps the securing member (4) that connecting rod (22) is gone up cylindrical bar (22b).

10. dichotomous extensive region according to claim 9 dentata hook nail holder, it is characterized in that: be equipped with intermediate gasket (5) between described securing member (4) and the connecting rod (22), described intermediate gasket (5) be shaped on can with cylindrical bar (22b) the circular arc button arc groove (5a) of joining mutually, and this intermediate gasket (5) is sleeved on the outer ring of retaining clip (3).