CN2316931Y

CN2316931Y - Artificial femur

Info

Publication number: CN2316931Y
Application number: CN 97243971
Authority: CN
Inventors: 史峰军; 刘湘彬; 焉树林; 符强; 刘长胜; 李春龙
Original assignee: Daqing oilfield general hospital
Current assignee: Daqing oilfield general hospital
Priority date: 1997-11-19
Filing date: 1997-11-19
Publication date: 1999-05-05
Anticipated expiration: 2007-11-19

Abstract

The utility model relates to an artificial femur which solves the problems that the previous artificial femur is easy to loosen and sink after implanted in a human body for a period of time. The utility model is characterized in that the shoulder of a femur handle is provided with a hole in which a fin regulated by a bolt and a nut is arranged, the fin can be embedded in the bone wall of a marrow cavity, therefore the artificial femur can be firmly fixed in the human body without loosening and sinking. In addition, the utility model has the advantage of low cost and is suitable for patients with artificial femur replacing operations to use.

Description

A kind of artificial thigh bone

This utility model relates to a kind of joint prosthesis, belongs to a kind of artificial thigh bone.

At present, kind of artificial thigh bone surplus having 30 both at home and abroad, its shank shape is similar, just material and surface texture are different: on the material, there are vitallium, titanium alloy, pottery, jade etc. multiple: on the surface configuration, have on the handle with holesly, pelmatozoa is made many micropores, Corallium Japonicum Kishinouye face etc. impelling bone to grow into, its purpose all be prevent loosening with sink; But through clinical practice with follow up a case by regular visits to for a long time, finds that above-mentioned these kinds artificial thigh bone still exists loosening and sinking problem, after long-time especially the use, loosening and sinking nearly all appear; Up to the present, also there is not a kind of ideal artificial thigh bone that can thoroughly solve loosening and sinking problem.

The purpose of this utility model is exactly to provide a kind of thorough solution loosening artificial thigh bone with the sinking problem in order to overcome above-mentioned the deficiencies in the prior art.

The purpose of this utility model reaches by the following technical programs: this kind artificial thigh bone, double motion head by utmost point layer in femoral stem, neck of femur and the band and outer utmost point layer is formed, be characterized in: the shoulder in femoral stem has a counter sink, the counter sink lower vertical has a through hole in the femoral stem surface, and counter sink communicates with through hole; Counter sink is built-in with bolt, and bolt extends in the through hole and head has nut, in through hole near counter sink one end and in the both sides of bolt intrinsic two bearing pins that run through through hole, all being with on the bearing pin can be around the fin of its rotation.

This utility model has following advantage than prior art: because this kind artificial thigh bone is provided with the bolt and the nut of rotatable open fin and adjusting fin opening angle, fin opens the back and embeds on the bone marrow spinal joints wall, can control prosthese effectively in the activity of pulp cavity internal rotation, make this kind artificial thigh bone unlikely loosening; Also shared the pressure of neck brace, overcome stress concentration, can stop its sinking effectively because of the supporting role of two fins, in daily life and walking, deepen because the pressure of upper body can make both wings embed, make artificial thigh bone more firm in medullary cavity, even long-time use also need not to overhaul; In addition, low, the long service life of this kind artificial thigh bone cost is easy to be accepted by the patient.

Accompanying drawing 1 is a structure chart of the present utility model;

Accompanying drawing 2 is A-A cutaway views of this utility model Fig. 1.

The utility model is described in further detail below in conjunction with accompanying drawing: by Figure 1 and Figure 2, this kind artificial thigh bone, double motion head by utmost point layer 1 and outer utmost point layer 2 in femoral stem 6, neck of femur 8 and the band is formed, shoulder in femoral stem 6 has a counter sink 9, counter sink 9 lower vertical have a through hole 10 in femoral stem 6 surfaces, and counter sink 9 communicates with through hole 10; Counter sink 9 is built-in with bolt 3, and bolt 3 extends in the through hole 10 and head has nut 4, through hole 10 in close counter sink 9 one ends and in the both sides of bolt 3 intrinsic two bearing pins 7 that run through through hole 10, all being with on the bearing pin 7 can be around the fin 5 of its rotation.

During use, this artificial thigh bone is placed in the human body, by regulating the opening angle of bolt 3 controllable sail 5,, make fixing more firmly, use this artificial thigh bone can thoroughly solve loosening and sinking problem so that it embeds on the bone wall of human bone marrow's intracavity; In addition, this utility model cost is low, is suitable for the patient and uses.

Claims

1, a kind of artificial thigh bone, double motion head by utmost point layer (1) and outer utmost point layer (2) in femoral stem (6), neck of femur (8) and the band is formed, it is characterized in that: the shoulder in femoral stem (6) has a counter sink (9), counter sink (9) lower vertical has a through hole (10) in femoral stem (6) surface, and counter sink (9) communicates with through hole (10); Counter sink (9) is built-in with bolt (3), bolt (3) extends in the through hole (10) and head has nut (4), in through hole (10) near counter sink (9) one ends and in the both sides of bolt (3) intrinsic two bearing pins (7) that run through through hole (10), all being with on the bearing pin (7) can be around the fin (5) of its rotation.