CN213406249U

CN213406249U - Internal fixing screw for lumbar vertebra side vertebra

Info

Publication number: CN213406249U
Application number: CN202021833958.6U
Authority: CN
Inventors: 魏东; 唐雪彬; 李华; 王云清; 张峻玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-06-11
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a lumbar vertebrae side internal fixation screw of vertebra, including the body of rod that a plurality of connects gradually the combination form the assembly, set up at the pointed end of assembly bottom and set up the bolt at the assembly top. The utility model adopts the triangular pyramid shape, so that the device is firmly fixed; the length can be conveniently adjusted by adopting a mode of combining a plurality of rod bodies, so that the telescopic rod is suitable for different crowds; the stud is designed to be an eccentric stud, and the threaded hole is a right-circular threaded hole, so that the fixing between the rod body and the rod body, between the rod body and the tip end and between the bolt and the rod body is very firm.

Description

Internal fixing screw for lumbar vertebra side vertebra

Technical Field

The utility model relates to a lumbar vertebrae side centrum internal fixation screw belongs to medical equipment technical field.

Background

The spine is an important supporting structure for maintaining the standing of a human body, the spine is formed by connecting vertebral bodies, the vertebral bodies are connected through intervertebral discs and facet joints, and the spine has stability and certain mobility due to the ingenious connection. The lumbar spondylolisthesis, lumbar instability, intervertebral disc protrusion and other diseases often affect the stability of the spine, cause pain of waist and legs, affect the life quality of patients, have no effect on conservative treatment and need surgical treatment; the present more common operation approach mode is the lumbar vertebrae back approach intervertebral discectomy intervertebral bone grafting fusion internal fixation, but the lumbar vertebrae back approach operation, great to muscle soft tissue injury, has destroyed the rear structure of backbone simultaneously, leads to patient's postoperative bed time longer, recovers slowly, appears intractable back pain even. To reduce these complications, clinicians seek to reduce the damage to muscle and bone structures by altering the surgical approach to achieve as little trauma as possible and faster recovery.

With the development of modern industrial techniques and spinal surgery, the application of oblique lateral intervertebral fusion has been followed through continuous exploration. The patient lies on the side earlier, and the doctor reaches the pathological change position through the side of patient's body, handles the intervertebral disc, carries out intervertebral bone grafting and fuses, and the physiological curvature of the spinal column of recovering that can be better then changes into the prone position, increases the stability of spinal column through the wicresoft puts the nail from the rear again, and the operation wound is less relatively, recovers soon.

Currently, the oblique lateral intervertebral fusion is an effective operation type for treating diseases such as lumbar intervertebral disc protrusion, lumbar spondylolisthesis, lumbar instability and the like, and has the advantages of small wound and quick recovery. The oblique lateral intervertebral fusion mainly comprises 2 parts: the lateral position is firstly used for lumbar oblique lateral intervertebral fusion, and then the lumbar posterior pedicle screw is used for internal fixation in the prone position. But has the defects of needing to change the body position in the operation, long operation time, higher rear minimally invasive nail placing cost and the like.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a fixing screw in the lumbar vertebra side pyramid, which is firmly fixed by adopting a triangular pyramid shape; the length can be conveniently adjusted by adopting a mode of combining a plurality of rod bodies, so that the telescopic rod is suitable for different crowds; the stud is designed to be an eccentric stud, and the threaded hole is a right-circular threaded hole, so that the fixing between the rod body and the rod body, between the rod body and the tip end and between the bolt and the rod body is very firm.

In order to realize above-mentioned purpose, an internal set screw of lumbar vertebrae side square vertebra, including a plurality of connect gradually the body of rod of combination formation, set up at the pointed end of assembly bottom and set up the bolt at the assembly top, the body of rod is the triangular pyramid of sharpening, the pointed end is the triangular pyramid, the screw hole that matches with the double-screw bolt is seted up at the bottom of the body of rod, the top, the double-screw bolt is eccentric double-screw bolt, the screw hole is the perfect circle screw hole, the bolt bottom also is provided with the eccentric double-screw bolt the same with the double-screw bolt, the perfect circle screw hole the same with the screw hole is seted up on the upper portion of pointed end, rotate on the bolt.

Preferably, the rod body, the stud, the bolt, the tip and the connecting rod are all made of titanium alloy.

Preferably, the bottom of the threaded hole is provided with a clamping groove, and one end of the stud, which is far away from the rod body, is provided with a boss corresponding to the clamping groove.

Preferably, the edges of the boss are each provided with a chamfer.

Preferably, each side of the shank is rounded.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the device is firmly fixed by adopting the triangular pyramid shape;

2. the length can be conveniently adjusted by adopting a mode of combining a plurality of rod bodies, so that the telescopic rod is suitable for different crowds;

3. the stud is designed to be an eccentric stud, and the threaded hole is a right-circular threaded hole, so that the fixing between the rod body and the rod body, between the rod body and the tip end and between the bolt and the rod body is very firm.

Drawings

Fig. 1 is a first schematic structural diagram of the present invention;

FIG. 2 is a second schematic structural view of the present invention;

fig. 3 is a schematic structural view of a combined body of the rod body of the present invention;

fig. 4 is a schematic structural view of the rod body of the present invention;

fig. 5 is a side view of the rod body of the present invention;

fig. 6 is a top view of the rod body of the present invention;

fig. 7 is a schematic structural view of the connecting rod of the present invention;

fig. 8 is a sectional view of the connection between the rod body and the tip of the present invention.

In the figure: 1. the bolt comprises a rod body 1-1, a stud 1-2, a threaded hole 1-3, a boss 1-4, a clamping groove 2, a bolt 3, a tip 4 and a connecting rod.

Detailed Description

The technical solutions in the implementation of the present invention will be clear from the following description and accompanying drawings, and the described embodiments are only some embodiments, not all embodiments, of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 8, the embodiment of the utility model provides a pair of internal set screw of lumbar vertebrae side pyramid, including the assembly that a plurality of connects gradually body of rod 1 formation of combination, set up at the most advanced 3 of assembly bottom and set up the bolt 2 at the assembly top, body of rod 1 is the triangular pyramid that sharpens, most advanced 3 is the triangular pyramid body, the bottom of body of rod 1 is provided with double-screw bolt 1-1, the top is seted up threaded hole 1-2 that matches with double-screw bolt 1-1, double-screw bolt 1-1 is eccentric double-screw bolt, threaded hole 1-2 is the perfect circle screw hole, bolt 2 bottom also is provided with the eccentric double-screw bolt the same with double-screw bolt 1-1, the perfect circle screw hole the same with threaded hole 1-2 is seted up on the upper portion of most advanced 3, bolt 2 rotates and installs connecting rod 4.

Preferably, the rod body 1, the stud 1-1, the bolt 2, the tip 3 and the connecting rod 4 are all made of titanium alloy. The density of the titanium alloy is only 56% of that of the stainless steel, the load of the human body is greatly reduced after the titanium alloy is implanted into the human body, and the elastic modulus of the titanium alloy is only 53% of that of the stainless steel, so that the stress shielding effect can be reduced, the natural bone elastic modulus of the human body is believed to be more beneficial to the growth and healing of the human bone, and the titanium alloy has very good corrosion resistance.

Preferably, the bottom of the threaded hole 1-2 is provided with a clamping groove 1-4, and one end of the stud 1-1, which is far away from the rod body 1, is provided with a boss 1-3 corresponding to the clamping groove 1-4. The bosses 1-3 are matched with the clamping grooves 1-4, so that the rod bodies 1 are aligned more easily.

Preferably, the edges of the bosses 1-3 are provided with chamfers. The rotation resistance between the boss 1-3 and the threaded hole 1-2 is reduced.

Preferably, each side of the rod body 1 is rounded. Reducing the resistance to insertion of the rod body 1.

The working process is as follows: according to the required length, a plurality of rod bodies 1 are connected at one time to form a combined screw, and because the threaded holes 1-2 are right-circular threaded holes and the studs 1-1 are eccentric studs, the threaded holes 1-2 and the studs 1-1 are connected very firmly and cannot be loosened. The screws are driven into the lumbar vertebrae and fixedly connected through the connecting rod 4.

In summary, the utility model adopts the triangular pyramid shape to firmly fix the device; the length can be conveniently adjusted by adopting a mode of combining a plurality of rod bodies, so that the telescopic rod is suitable for different crowds; the stud is designed to be an eccentric stud, and the threaded hole is a right-circular threaded hole, so that the fixing between the rod body and the rod body, between the rod body and the tip end and between the bolt and the rod body is very firm.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the embodiments may be appropriately combined to form other embodiments understood by those skilled in the art.

Claims

1. A lumbar vertebra side pyramid internal fixation screw is characterized by comprising a combination body formed by a plurality of rod bodies (1) which are sequentially connected and combined, a tip (3) arranged at the bottom of the combination body and a bolt (2) arranged at the top of the combination body, the rod body (1) is a pointed triangular pyramid, the tip (3) is a triangular pyramid, the bottom of the rod body (1) is provided with a stud (1-1), the top of the rod body is provided with a threaded hole (1-2) matched with the stud (1-1), the stud (1-1) is an eccentric stud, the threaded hole (1-2) is a perfect circular threaded hole, the bottom of the bolt (2) is also provided with an eccentric stud which is the same as the stud (1-1), the upper part of the tip (3) is provided with a regular round threaded hole which is the same as the threaded hole (1-2), and the bolt (2) is rotatably provided with a connecting rod (4).

2. The internal fixation screw of the lumbar and side vertebral body according to claim 1, wherein the rod body (1), the stud (1-1), the bolt (2), the tip (3) and the connecting rod (4) are all made of titanium alloy.

3. The internal fixation screw for the lumbar and side vertebral bodies as claimed in claim 1, wherein the bottom of the threaded hole (1-2) is provided with a slot (1-4), and one end of the stud (1-1) far away from the rod body (1) is provided with a boss (1-3) corresponding to the slot (1-4).

4. The set screw in the lumbar lateral vertebra according to claim 3, characterized in that the edges of the bosses (1-3) are chamfered.

5. The internal fixation screw of a lumbar lateral vertebra according to claim 1, characterized in that each side of said shank (1) is rounded.