CN1106248A

CN1106248A - Restoring fixator of vertebra front position vertebral body

Info

Publication number: CN1106248A
Application number: CN 94101170
Authority: CN
Inventors: 吴兴盛; 陈博光
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-02-03
Filing date: 1994-02-03
Publication date: 1995-08-09
Anticipated expiration: 2014-02-03
Also published as: CN1071108C

Abstract

The replacing fixator for anteposition of vertebras has a cylindrical central base screwed with top and bottom screw bolts with different thread directions. Both screw bolts are screwed a disk with teeth on periphery respectively. After decompression operation, the fixator is placed to damaged position between vertebras and turning the both screw bolts out can make the top and bottom toothed disks in contact respectively to upper and lower vertebras, so replacing the damaged vertebra and intervertebral disk which has been taken away.

Description

Restoring fixator of vertebra front position vertebral body

The present invention relates to reduction fixture device between a kind of vertebra anteposition cone, it mainly is to insert a tubular pivot button seat in the space that taking-up pathological changes vertebral body Hou is left on the vertebra anteposition, this pivot button seat upper and lower side has screwed togather a screw rod with positive and negative screw thread respectively, the terminal spiral shell of screw rod is provided with the dish seat, through switching pivot button seat the outside respectively spiral shell of two screw rods is gone out, thereby reset response is supported so that vertebra one to be provided in the top, the bottom surface that make two dish seats resist two adjacent vertebral bodys on this space respectively.

Vertebra is one of most important organ in the human body, yet when people suffer a car accident accident, sport injury, and even infection or tumor, but all will cause the pathological changes injury of vertebra, as shown in Figure 6, it is the end of vertebra in the human body, wherein often pathological changes to occur and pressuring nerve symptom position is arranged be vertebral body 90 in its anteposition to vertebra, when wherein one the joint vertebral body 91 fracture, send out point and when the nerve compression symptom is arranged, the present practice is that this joint pathological changes vertebral body 91 is taken out, to reduce nerve compression, and after these pathological changes vertebral body 91 taking-ups, must in it leaves over the space, insert a suitable implants, to engage neighbouring vertebral body 90, stability behind the decompression is provided, the practice in the past is to implant block bone, or adds inner fixer again, to aspire for stability, and on reset operation and steadiness, do not attain ideal yet with present existing holder, deeply probe into so the vertebra fixator for front position reduction that how to provide a reset operation simply to reach firm safety is promptly worth.

Main purpose of the present invention is providing a kind of restoring fixator of vertebra front position vertebral body, it mainly is to insert a tubular pivot button seat in the space of being left over by the pathological changes vertebral body on vertebra, this pivot button seat upper and lower side has screwed togather a screw rod with positive and negative screw thread respectively, the terminal spiral shell of screw rod is provided with the dish seat, through switching pivot button seat, its upper and lower two screw rods respectively outwards spiral shell go out, thereby the top, the bottom surface that make two dish seats resist two adjacent vertebral bodys in this space respectively, to provide vertebra one the firm supporting role that resets.

The invention provides a kind of restoring fixator of vertebra front position vertebral body, be primarily characterized in that: a pivot button seat upper and lower side that is hollow tube-shape forms positive and negative female thread respectively, has screwed togather a screw rod therebetween respectively,

Form the positive and negative screw thread corresponding with pivot button seat on the two screw rods respectively, and correspondence is screwed together on the pivot button seat, two screw rods outboard end centre is formed with screw again, fixes a dish thereon,

This dish seat is to be a concave arc plate-like, its centre of trying to get to the heart of a matter is formed with a fixing hole, be equipped with a bolt on the fixing hole, the bolt correspondence is screwed in the screw of screw rod outboard end, two dish seats are individually fixed in the screw rod end, be provided with the carriage that passes described screw rod in this dish seat bottom, this carriage is fixedly installed between the vertebral body of vertebra.

Described restoring fixator of vertebra front position vertebral body is characterized in that: this dish seat Zhou Bianhuan establishes and is formed with a plurality of pointed tooths.

Described restoring fixator of vertebra front position vertebral body is characterized in that: this dish seat outer bottom appropriate location ring is established and is formed with a plurality of depressions, and screw rod end correspondence is formed with double wedge again, in the depression of this double wedge embedding dish seat.

Described restoring fixator of vertebra front position vertebral body is characterized in that: the above-mentioned set bolt of this dish seat is not tightened on the screw rod.

Described restoring fixator of vertebra front position vertebral body is characterized in that: this pivot button seat lateral wall appropriate location is formed with a hexagonal wall for the die nut switching.

Described restoring fixator of vertebra front position vertebral body is characterized in that: this hexagonal wall is formed with the hexagonal perforation of inserting switching for inner hexagon spanner.

Described restoring fixator of vertebra front position vertebral body, it is characterized in that: this carriage is-L shaped shape, its vertical wall cooperates the vertebral body radian to be formed with an arc wall portion, and arc wall portion is provided with for the perforation that wears steel nail, then forms the corresponding groove that screw rod is held the dish seat that passes on its horizontal wall.

As shown in the above description, effect of the present invention mainly is to set up screw rod and dish seat on a pivot button seat separately, to constitute a restoring fixator of vertebra front position vertebral body, insert this pivot button seat in the space that taking-up pathological changes vertebral body Hou is left on the vertebra anteposition, this pivot button seat upper and lower side has screwed togather a screw rod with positive and negative screw thread respectively, the terminal spiral shell of screw rod is provided with the dish seat, through switching pivot button seat the outside respectively spiral shell of two screw rods is gone out, thereby reset response is supported so that vertebra one to be provided in the top, the bottom surface that make two dish seats resist two adjacent vertebral bodys on this space respectively.And this reduction fixture device is owing to have bigger then area, and cooperates the fixing of this carriage, has the combination stability of height, and the medical effect after it not only guarantees to assemble also ensures the safety and the rights and interests of sufferer simultaneously.

Further specify architectural feature of the present invention and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a section plan of the present invention.

Fig. 3 is that illustration is implemented in side-looking of the present invention.

Fig. 4 looks the enforcement illustration for the back of the body of the present invention.

Fig. 5 is a top plan view of the present invention.

Fig. 6 is the plane graph of vertebra end.

Relevant structure of the present invention partly, please at first consult shown in Figure 1, it mainly is to form positive and negative female thread 11 respectively at pivot button seat 10 upper and lower sides that are hollow tube-shape, this pivot button seat stage casing, 10 lateral wall or appropriate location are formed with a hexagonal wall 12, can supply the spanner switching, be formed with hexagonal perforation 13 on each wall of this hexagonal wall 12 respectively, can insert for inner hexagon spanner, and this pivot button seat 10 of switching;

Screwed togather a screw rod 20 respectively in the positive and negative female thread 11 of pivot button seat 10 again, formed the positive and negative screw thread 21 corresponding on the two screw rods 20 respectively, so that correspondence is screwed together on the pivot button seat 10 with pivot button seat 10; Two screw rods 20 outboard end centre are formed with screw 22 again, its periphery then is formed with a plurality of double wedges 23, be arranged with a dish seat 30 on it, this dish seat 30 is to be a concave arc plate-like, its dish edge ring is established and is formed with a plurality of pointed tooths 31, its card periphery is formed with a plurality of perforation 32 again, grow into for placing the fusion of bone graft and bone, its centre of trying to get to the heart of a matter then forms a fixing hole 33, be equipped with a bolt 34 on the fixing hole 33, bolt 34 correspondences are screwed in the screw 22 of screw rod 20 outboard end, so that two dish seats 30 are individually fixed in screw rod 20 ends, see also shown in Figure 2 again, in fact this bolt 34 is not screwed in the screw 22 fully, and in other words, dish seat 30 is not tightened on the screw rod 20, and the angular deflection that must produce about 30 degree, with the angle of engage vertebral body.

See also Fig. 1, shown in Figure 2 again, these dish seat 30 outsides are formed with a plurality of depressions 35 near on the wall of central fixing hole 33 with suitable spacing, each depression 35 is that the double wedge 23 with screw rod 20 ends is staggered before unassembled, when installing, then make dish seat 30 and screw rod 20 relative rotation one angles, can make the depression 35 of the double wedge 23 corresponding embedding dish seats 30 on the screw rod 20, and location effect is provided.

Be guarantee this dish seat 30 firm in addition when assembling, can cooperate two carriages 40 to fix it, two carriages 40 are generally to be-L shaped shape, its vertical wall is that cooperation vertebral body surface radian forms an arc wall portion 41; be formed with two perforation 410 in the arc wall portion 41; be equipped with steel nail 42 on it respectively by the varying level position; pierce with suitable angular cross and be fixed on the vertebral body; then be formed with a groove 43 again on the horizontal wall of carriage 40; it can pass screw rod 20 pallet seats 30; have the 30 deflection spaces of spending to eliminate original screw rod 20 and to coil 30 of seats, and guarantee its degree of stability, statement after assembling kenel please be held in detail as for it.

By above-mentioned explanation, can find out concrete structure kenel of the present invention, detailed as described below as for its assembling aspect:

Reduction fixture device of the present invention is to look the vertebral body damaged place space size of sufferer vertebral disease vertebral body after the decompression excision before installation, two screw rods 20 on the adjustment pivot button seat 10 is to suitable length, then it is inserted and take out in the damaged space of being left over behind the pathological changes vertebral body 92 on the vertebra, as shown in Figure 3, the installation site of this reduction fixture device is 92 neighbouring two vertebral bodys, 90 centre in this damaged space, to obtain the most stable support fixation effect, because excision pathological changes vertebral body and intervertebral disc are left over 90 ends of adjacent vertebral bodies in damaged space 92, end face may be a forward leaning angle, but be somebody's turn to do the dish seat 30 of deflection angle this moment and can adjust its angle automatically to cooperate 90 ends of neighbouring vertebral body, the gradient of end face, and resist on it, make dish seat 30 itself rotate an angle again, depression 35 correspondences of its outer bottom are embedded on the double wedge 23 of screw rods 20 ends, utilize spanner or inner hexagon spanner switching pivot button seat 10 subsequently again, since pivot button seat 10 upper and lower sides and two screw rods 20 form respectively relative just, left-hand thread, so when pivot button seat 10 rotates, two screw rods 20 will be simultaneously with upper and lower to respectively outwards spiral shell go out, and the dish seat 30 of screw rod 20 ends also pushes against on adjacent simultaneously, the end of hypocentrum 90, end face, because of dish seat 30 is to contact with vertebral body 90 with a disc face, so have a bigger bonding area, 31 of the pointed tooths of dish seat 30 peripheries formation can go deep into vertebral body 90 inner surfacies again, can guarantee 90 unlikely generation displacement phenomenons of dish seat 30 and vertebral body by this.

It is after being assembled in vertebra, for guaranteeing to coil the firm of seat 30, promptly utilize this carriage 40 to be fixed, as shown in Figure 4, it mainly is that carriage 40 is inserted by vertebral body 90 sides, and pass screw rod 20 with the groove on its horizontal wall 43, wait and be advanced to the end, carriage 40 vertically to arc wall portion 41 will be close to vertebral body 90 outer surfaces, squeeze into the perforation 410 of steel nail 42 in arc wall portion 41 in the vertebral body 90 this moment again, wherein two steel nails 42 are to squeeze into vertebral body 90 as shown in Figure 5 with varying level position mat interleaved mode, use 20 former automatic deflection that pre-exist of elimination dish seat 30 and screw rod, so can guarantee the firm of this dish seat 30, thereby improve the assemble stable of whole reduction fixture device.

Claims

1, a kind of restoring fixator of vertebra front position vertebral body is primarily characterized in that: a pivot button seat upper and lower side that is hollow tube-shape forms positive and negative female thread respectively, has screwed togather a screw rod therebetween respectively,

2, restoring fixator of vertebra front position vertebral body according to claim 1 is characterized in that: this dish seat Zhou Bianhuan establishes and is formed with a plurality of pointed tooths.

3, restoring fixator of vertebra front position vertebral body according to claim 1 is characterized in that: this dish seat outer bottom appropriate location ring is established and is formed with a plurality of depressions, and screw rod end correspondence is formed with double wedge again, in the depression of this double wedge embedding dish seat.

4, according to claim 1 or 2 or 3 described restoring fixator of vertebra front position vertebral body, it is characterized in that: this dish seat is gone up set bolt and is not tightened on the screw rod.

5, restoring fixator of vertebra front position vertebral body according to claim 1 is characterized in that: this pivot button seat lateral wall appropriate location is formed with a hexagonal wall for the die nut switching.

6, restoring fixator of vertebra front position vertebral body according to claim 1 is characterized in that: this hexagonal wall is formed with the hexagonal perforation of inserting switching for inner hexagon spanner.

7, restoring fixator of vertebra front position vertebral body according to claim 1, it is characterized in that: this carriage is-L shaped shape, its vertical wall cooperates the vertebral body radian to be formed with an arc wall portion; arc wall portion is provided with for the perforation that wears steel nail, then forms the corresponding groove that screw rod is held the dish seat that passes on its horizontal wall.