CN203369947U

CN203369947U - External fixator screws

Info

Publication number: CN203369947U
Application number: CN201320311602.XU
Authority: CN
Inventors: 曹培锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2014-01-01
Anticipated expiration: 2023-06-03

Abstract

The utility model discloses external fixator screws and belongs to the field of medical instruments. The external fixator screw is characterized in that a threaded end (1) can be designed to be with various lengths, a screw rod near end (2) has a frosted surface, and a screw rod tail end (3) is in the shape of a regular hexagon. Compared with the prior art, the external fixator screw has the advantages that because the external fixator screws are provided with the threaded ends (1) with different lengths, the external fixator screws can be adapted to the diameter lengths of backboneson different portions, and the situation that the portion, implanted into the bones, of the external fixator screw is too long or too short is avoided; because the external fixator screw is provided with the screw rod near end (2) with the frosted surface, the degree of bonding between the external fixator screw and skin soft tissue is increased, and gaps and infection are reduced; because the external fixator screw is provided with the screw rod tail end (3) in the shape of the regular hexagon, the external fixator screw can be effectively prevented from slipping and spinning, and the steadiness of an external fixator in fixation is increased; because a screw rod is designed to be shortened, the screw is shortened, rehabilitation exercise is facilitated for patients, and the effect of treating fractures with the external fixator is enhanced.

Description

A kind of external fixer screw

Technical field

This utility model belongs to technical field of medical instruments, is that a kind of and exterior fixation bracket Combination application are in the apparatus of fracture fixation.

Background technology

In the extremity fracture fixing operation, some need to be fixed with exterior fixation bracket and screw, and screw nail bar used was round and smooth in the past, a little less than the hold of fixture block to screw, causes poor stability and poor with the skin conjugation at place, nail hole, and infection is more easily caused in gap.Screw is oversize in addition brings very big inconvenience to operation technique and the rehabilitation in patient's later stage; The long interior rear offside of screw placement bone that often occurs of front end screw thread passes too much, easily causes tissue injury and musculation limited; The front end screw thread is too short to a little less than key hold, fixing unreliable; The long patient of nail bar can not wear the clothes and affect the rehabilitation exercise.

The utility model content

Technical problem to be solved in the utility model is in order to overcome above defect, provide a kind of and can make the operation technique convenience, plant nail accurately, strengthen the external fixer constant intensity, reduce tissue injury, reduce the fracture fixation apparatus that the nail hole is infected and is conducive to patient activity.

In order to solve the problems of the technologies described above, the technical scheme that this utility model adopts is: this external fixer screw is used medical stainless steel or titanium metal material to make, comprise the end of thread of front end and the nail bar at rear, the nail bar is divided into again the nail bar near-end that the surface frosted sample is connected with the end of thread and the side's hexagonal nail bar tail end extended back.It is characterized in that: the end of thread of described external fixer screw is designed with all lengths, and nail bar near-end is circular mill sand sample surface, the nail bar tail end side of being hexagon.

The end of thread is circular, and length is 30-80mm, and diameter is 5-5.5mm.

Nail bar near-end is circular, and length is 20-30mm, and diameter is 5-6mm.

The nail bar tail end side of being hexagon, length is 20-30mm, diameter 6-7mm.

This external fixer screw, by the improvement to existing screw, has the end of thread of different length, adapts to different parts backbone's diameter; There is the nail bar near-end of surface frosted sample to increase the conjugation with skin; The nail bar tail end of the side's of having hexagonal, can effectively anti-skiddingly prevent revolving, and increases the fixing stable degree of external fixer; The cripetura of nail bar designs, and has greatly shortened the length of screw.

During use, by the reduction of the fracture, on the backbone at fracture two ends with each dozen of 2-3 of bone drill bone hole, after depth measurement, select in the screw placement bone of end of thread length and bone hole coupling, exterior fixation bracket is installed, and the fixture block on fixed mount combines and locks with the hexagonal tail end of screw, completes the fixing of fracture.

The beneficial effect that compared with prior art this utility model has is: outer set screw of the present utility model has the end of thread of different length, adapts to different parts backbone's diameter length, avoids inserting the long or too short of the interior part of bone.There is the nail bar near-end of surface frosted sample to increase the conjugation with skin soft tissue, reduced gap and can reduce infection.The nail bar tail end of the side's of having hexagonal, can effectively anti-skiddingly prevent revolving, and increases the fixing stable degree of external fixer.The cripetura of nail bar designs, and has shortened the length of screw, facilitates patient's reconditioning, improves the effect of External Fixation in Treatment fracture.

The accompanying drawing explanation

The structural representation that Fig. 1 is this utility model embodiment;

The A that Fig. 2 is Fig. 1 is to view;

In figure: 1 end of thread 2 nail bar near-end 3 nail bar tail ends

The specific embodiment

As shown in Figure 1-2, the external fixer screw of the present embodiment, be comprised of the circular end of thread 1, the circular hexagonal nail bar tail end 3 of nail bar near-end 2 and side.1 section oblique screw thread that annular is arranged of the end of thread, length is 30-80mm, diameter is 5-5.5mm.Follow closely the round bar that 2 sections of bar near-ends are the surface frosted sample, length is 20-30mm, and diameter is 5-6mm.Nail bar tail end Duan Weifang hexagon, length is 20-30mm, diameter 6-7mm.

The end of thread 1 of this external fixer screw circle is after accomplishing fluently the bone hole with bone drill, along in the implantable bone of bone hole, 2 sections of circular nail bar near-ends and skin soft tissue are combined closely, and 3 firm combinations of the fixture block with external fixer of the hexagonal nail bar tail end in side, play fixation to fracture site.

Claims

1. an external fixer screw, comprise nail bar near-end (2) and side's hexagonal nail bar tail end (3) that the circular end of thread (1) is circular, it is characterized in that: the end of thread (1) is designed with all lengths, nail bar near-end (2) is frosted sample surface, nail bar tail end (3) side of being hexagon.

2. a kind of external fixer screw according to claim 1, the end of thread (1) is designed with all lengths, and length is 30-80mm, and diameter is 5-5.5mm.

3. a kind of external fixer screw according to claim 1, nail bar near-end (2) is circular mill sand sample surface, and length is 20-30mm, and diameter is 5-6mm.

4. a kind of external fixer screw according to claim 1, follow closely bar tail end (3) side of being hexagon, and length is 20-30mm, diameter 6-7mm.