CN112587217B

CN112587217B - Screw for bone fixation

Info

Publication number: CN112587217B
Application number: CN202011478320.XA
Authority: CN
Inventors: 蒋臻欢; 王强; 曹志宏; 虞婧; 顾玲; 宋燕娇; 王芳
Original assignee: Yixing Peoples Hospital
Current assignee: Yixing Peoples Hospital
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2022-02-11
Anticipated expiration: 2040-12-15
Also published as: CN112587217A

Abstract

The embodiment of the invention provides a screw for bone fixation, belonging to the technical field of medical instruments, and the screw for bone fixation comprises: a nut, said nut comprising: the nut body is provided with a through hole which is a through hole and can accommodate a fixing wire; the nail body is connected and arranged at the lower end of the nut main body; the fixing wire is in surface contact with the through hole through the arc hole; the technical effect that the screw is not broken when the screw is fixed by the fixing wire is achieved.

Description

Screw for bone fixation

Technical Field

The invention relates to the technical field of medical instruments, in particular to a screw for bone fixation.

Background

After the fracture of the femur, the fixation of the femur with screws is required. However, in daily postoperative reexamination, the affected part of the patient is found to have the problem that the fixing screw is screwed outwards, so that the fixing strength of the affected part is lower than expected, and the recovery after fracture is influenced.

The existing coping method is to fix the position between the screw and the bone by using a fixing wire, wherein the fixing wire can be a steel wire, and the fixing wire can be bound to avoid the position movement of the screw. However, when binding is performed, the binding force is large, and the contact portion of the fixing wire with the screw is likely to be broken or cut.

Therefore, the technical problems of the prior art are as follows: when the fixing screw is fixed by the fixing wire, the fixing wire is easy to break.

Disclosure of Invention

The embodiment of the application provides a screw for bone fixation, which solves the technical problem that a fixing wire is easy to break when the fixing screw is fixed by the fixing wire in the prior art; the technical effect that the screw is not broken when the screw is fixed by the fixing wire is achieved.

The present embodiments provide a screw for bone fixation, the screw for bone fixation including: a nut, said nut comprising: the nut body is provided with a through hole which is a through hole and can accommodate a fixing wire; the nail body is connected and arranged at the lower end of the nut main body; wherein, the through hole has an arc pore, makes the fixed silk and the through hole contact with the form of face contact through the arc pore, the through hole is provided with a plurality of, and a plurality of wears to establish the hole and divide two sets of settings in the nut main part, and two sets of through holes set up the both sides in the nut main part.

Preferably, the two sets of through holes are symmetrically arranged with respect to the nut body.

Preferably, the arc-shaped pore passage is provided with an arc center, and the arc centers of the two groups of arc-shaped pore passages penetrating the pores are opposite or oppositely arranged.

Preferably, the two sets of through holes are arranged in a staggered manner, so that the fixing wire is in an offset state relative to the nut body after passing through the two sets of through holes.

Preferably, the two groups of through holes are a first group of through holes and a second group of through holes, the first group of through holes comprises first through holes, and the second group of through holes comprises second through holes and third through holes; the second through hole and the third through hole are arranged at intervals, and the first through hole is correspondingly arranged between the second through hole and the third through hole.

Preferably, the through hole is provided in an axial direction of the nut body.

Preferably, a lower end of the through hole penetrates through a lower end surface of the nut body, and an upper end of the through hole penetrates through an upper end surface of the nut body.

Preferably, the upper end of the nut body is provided with an inwards concave groove, and one end of the through hole is arranged on the groove surface of the groove in a penetrating mode.

Preferably, the groove is provided with a convex limiting edge, the limiting edge is provided with a guide groove, and the position of the fixing wire relative to the limiting edge is stable through the guide groove.

Preferably, the nut further comprises: the cap edge is arranged on the periphery of the nut body and can be attached in a deformable mode.

Preferably, the groove is connected with a support body, and the upper end surface of the support body is a curved arc surface, so that the fixing wire is attached to the support body in the process of bending and turning.

One or more technical solutions in the embodiments of the present application have at least one or more of the following technical effects:

1. in the embodiment of the application, the through hole with the arc-shaped pore passage is arranged on the nut body, so that the fixing wire is in surface contact with the screw, the stress area between the fixing wire and the screw is increased, the pressure of the fixing wire on the screw is dispersed, the stress in the screw is reduced, the local pressure on the fixing wire is reduced, and the technical problem that the fixing wire is easy to break when the fixing screw is fixed by adopting the fixing wire in the prior art is solved; the technical effect that the screw is not broken when the screw is fixed by the fixing wire is achieved.

2. In the embodiment of the application, the group number of the through holes and the position relation among the through holes are optimized, so that the fixing wire can be stably and symmetrically positioned for the force application of the screw, and the force application of the screw to the fracture part is stable. In addition, the nut main body is preferably penetrated from top to bottom in the through hole, so that the length of the through hole is short, and the fixing wire can penetrate through the through hole conveniently.

3. In the embodiment of the application, through the position dislocation setting between two sets of wearing holes for the stationary filament can be in the biasing state for the screw, with the eccentric pressurization demand when satisfying the screw and being in special position, guarantees that the screw can carry out the fixed of various angles and position as required.

4. In the embodiment of the application, through the arrangement of the groove, firstly, the screwing piece can perform twisting operation on the screw through the groove; secondly, the through holes penetrate through the groove surface, so that the fixing wires can be accommodated in the grooves, the fixing wires are embedded, soft tissues are protected, and the fixing wires are prevented from influencing the healing of other tissues. In addition, when the convex groove is provided with the limiting edge, the fixing wire stretches across the limiting edge and penetrates through the penetrating hole.

5. In the embodiment of the application, the brim with a thin size is arranged, so that the brim can deform, and firstly, the contact between the screw and the bone is more stable; secondly, the fixing wire can be contacted with the brim surface when passing through the brim, so that the local pressure of the fixing wire relative to the brim is reduced, and the screw in the application can be smoothly and tightly bound together when being matched with the fixing wire.

Drawings

FIG. 1 is a schematic axial view of a screw for bone fixation according to an embodiment of the present disclosure;

FIG. 2 is a cross-sectional axial view of a screw for bone fixation according to an embodiment of the present disclosure;

FIG. 3 is a side cross-sectional view of a nut according to an embodiment of the present application;

FIG. 4 is a schematic cross-sectional side view of the nut with the retaining wire inserted therein according to an embodiment of the present disclosure;

FIG. 5 is a side cross-sectional view of the nut and the driver of the present application;

FIG. 6 is a top cross-sectional view of a screw for bone fixation in an embodiment of the present application;

FIG. 7 is a top cross-sectional view of yet another screw for bone fixation in an embodiment of the present application;

FIG. 8 is a partial axial cross-sectional view of another screw for bone fixation according to an embodiment of the present application;

fig. 9 is a cross-sectional axial view of a screw for bone fixation according to another embodiment of the present invention.

Reference numerals: 1. a nut; 11. a nut body; 111. perforating holes; 111a, a first through hole; 111b and a second through hole; 111c and a third through hole; 112. a groove; 113. limiting ridges; 1131. a guide groove; 114. a support body; 12. a brim; 2. a nail body; 3. fixing the wire; 4. screwing parts; 41. and (6) positioning a groove.

Detailed Description

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The embodiment of the application provides a screw for bone fixation, a through hole 111 with an arc-shaped pore passage is arranged on a nut body 11, so that a fixing wire 3 is in surface contact with the screw, the stress area between the fixing wire 3 and the screw is increased, the pressure of the fixing wire 3 on the screw is dispersed, the local pressure on the fixing wire 3 is reduced, and the technical problem that the fixing wire 3 is easy to break when the screw is fixed by the fixing wire 3 in the prior art is solved; the technical effect that the fixing wire 3 does not break when fixing the screw is achieved.

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

A screw for bone fixation, the screw for bone fixation comprising: the nut comprises a nut 1 and a nail body 2, wherein the nut 1 is provided with a nut main body 11, the nut main body 11 is provided with a through hole 111, and the through hole 111 can accommodate a fixing wire 3; the nail body 2 is connected and arranged at the lower end of the nut main body 11; the through hole 111 has an arc hole, and the fixing wire 3 is in surface contact with the through hole 111 through the arc hole. When in use, the nail body 2 is firstly used for fixing, and then the cap edge 12 main body is matched with the upper fixing wire 3 for binding and fixing.

The nut 1, the nut 1 includes a nut body 11 and a brim 12, the nut body 11 has a plurality of types for use with different types of drivers 4. The brim 12 is provided at the periphery of the nut body 11, and is thin in size and large in width so that the brim 12 is deformably fitted to facilitate the brim 12 to be fitted to a bone to facilitate surface contact between the brim 12 and the fixing wire 3.

And a nut body 11 serving as a part for connecting the fixing wire 3 and urging the screw by the driver 4. The through hole 111 of the nut body 11 is a through hole so that the fixing wire 3 can penetrate through the nut body 11. For example, the lower end of the through hole 111 penetrates the lower end surface of the nut body 11, and the upper end of the through hole 111 penetrates the upper end surface of the nut body 11, so that the length of the through hole 111 is short, the through of the fixing wire 3 is facilitated, and the actual operation is facilitated. Preferably, the nut body is semi-circular in shape so that the outer surface is smooth, which is beneficial for protecting soft tissues. It should be noted that the plurality of through holes 111 are provided, the plurality of through holes 111 are provided in two groups on the nut body 11, and the two groups of through holes 111 are provided on two sides of the nut body 11. It should be noted that the through hole 111 is disposed relative to the axial direction of the nut body 11, so that the through hole 111 is approximately parallel to the nail body 2, so that the fixing wire 3 can press the screw against the bone. Preferably, the two sets of through holes 111 are arranged symmetrically with respect to the nut body 11. In one embodiment, the arc-shaped hole has an arc center, and the arc centers of the two sets of arc-shaped holes penetrating the hole 111 are opposite to each other. In another embodiment, the arc centers of the arc-shaped openings of the set of through-holes 111 are oppositely disposed.

In addition, the two sets of through holes are arranged in a staggered mode, so that the fixing wire 3 is in an offset state relative to the nut body 11 after penetrating through the two sets of through holes, and eccentric pressurization can be achieved when needed. In one embodiment, the two sets of through holes are specifically a first set of through holes and a second set of through holes, the first set of through holes 111 includes a first through hole 111a, and the second set of through holes includes a second through hole 111b and a third through hole 111 c; the second through hole 111b and the third through hole 111c are spaced apart from each other, and the first through hole 111a is correspondingly disposed between the second through hole 111b and the third through hole 111c, so as to bind the screw to the bone in an offset manner.

The upper end of the nut body 11 is provided with an inward concave groove 112, and one end of the through hole 111 is formed on the surface of the groove 112. The recess 112 may be used with a twist member 4. in one embodiment, the recess 112 is positioned in the middle of the nut body 11 such that both sides of the recess 112 have recess 112 groove surfaces. The groove 112 is provided with a protruding limiting edge 113, the screwing piece 4 is provided with an inward concave positioning groove 41, and the screwing piece 4 can stably drive the screw to rotate through the cooperation of the positioning groove 41 and the limiting edge 113.

In addition, can set up a guide slot 1131 on spacing stupefied 113, guide slot 1131 can be concave in the up end face for spacing stupefied 113, also can be located the inside of spacing stupefied 113 to can inlay when making the fixed silk 3 fixed and establish in guide slot 1131, make the fixed silk 3 more stable for the fixed of nut main part 11, prevent that fixed silk 3 from sliding for spacing stupefied 113. On the other hand, for supporting the fixing wire 3 located at the section from the through hole 111 to the limiting edge 113, the groove 112 is provided with a supporting body, the supporting body 114 is fixedly connected with the groove 112, and the upper end surface of the supporting body 114 is an arc surface, so that the upper end surface of the supporting body 114 is completely attached to the fixing wire 3 in a bending state, and the stress area of the fixing wire 3 relative to the nut body 11 is increased. And the cross section of the upper end surface of the supporting body 114 is preferably a concave arc surface, so that the position of the fixing wire 3 is limited while the fixing wire 3 is accommodated, and the shaking of the fixing wire 3 is reduced.

The working principle is as follows:

the through hole 111 is worn to establish by the fixed wire 3, and the laminating of the arc pore of fixed wire 3 and through hole 111 for face contact between fixed wire 3 and the screw makes the partial pressure of fixed wire 3 little, avoids fixed wire 3 part to be sheared off by the sideline at the ligature in-process.

The technical effects are as follows:

3. In the embodiment of the application, the position between the two groups of through holes is staggered, so that the fixing wire can be in a biased state relative to the screw, the eccentric pressurizing requirement when the screw is in a special position is met, and the screw can be fixed at various angles and positions as required

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A screw for bone fixation, comprising:

a nut, said nut comprising:

the nut body is provided with a through hole which is a through hole and can accommodate a fixing wire; the through holes are arranged in the axial direction relative to the nut body, the lower ends of the through holes penetrate through the lower end face of the nut body, and the upper ends of the through holes penetrate through the upper end face of the nut body;

the nail body is connected and arranged at the lower end of the nut main body;

wherein, the through hole has an arc pore, makes the fixed silk and the through hole contact with the form of face contact through the arc pore, the through hole is provided with a plurality of, and a plurality of wears to establish the hole and divide two sets of settings in the nut main part, and two sets of through holes set up the both sides in the nut main part, the arc pore has an arc center, and the arc center in the arc pore of two sets of through holes sets up relatively or opposite, and two sets of through holes dislocation set to be in the offset state for the nut main part after making the fixed silk wear to establish two sets of through holes.

2. The screw for bone fixation of claim 1, wherein the two sets of through holes are specifically a first set of through holes including the first through hole and a second set of through holes including the second through hole and the third through hole;

the second through hole and the third through hole are arranged at intervals, and the first through hole is correspondingly arranged between the second through hole and the third through hole.

3. The screw for bone fixation as claimed in claim 1, wherein the nut body is provided at an upper end thereof with a concave groove, and one end of the through hole is bored on a groove surface of the groove.

4. The screw for bone fixation as recited in claim 3, wherein the groove is provided with a convex limiting ridge, and the limiting ridge is provided with a guide groove, so that the position of the fixing wire relative to the limiting ridge is stabilized by the guide groove.

5. The screw for bone fixation as claimed in claim 3, wherein the support body is connected to the groove, and the upper end surface of the support body is a curved surface so that the fixing wire is attached to the support body during the bending and turning process.