CN201759701U

CN201759701U - Stress uniform distribution type femur handle prosthese

Info

Publication number: CN201759701U
Application number: CN 201020537229
Authority: CN
Inventors: 丁莹莹
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2010-09-21
Filing date: 2010-09-21
Publication date: 2011-03-16
Anticipated expiration: 2020-09-21

Abstract

The utility model relates to a stress uniform distribution type femur handle prosthese, the front and rear sides of the handle body, employing convexity design, are additionally provided with projections with certain radian, the left side adopts arc convexity design, thus, the near-end of the handle body and the spongy bone are in a force fit, a small amount of gap is left between the far-end body and the spongy bone, the near-end of the handle body can be uniformly forced through the tight combination between the projections at the near-end of the handle body and the surrounding sclerotin, facilitating the uniform ankylosis of the handle body and the sclerotin and preventing the handle body and the sclerotin from sinking due to loosening between the handle body and the sclerotin. the near-end part of the femur handle adopts hydroxyapatite coating to facilitate the ankylosis of the handle body and the sclerotin.

Description

Stress uniform distribution type type femoral bone end prosthesis

Technical field

This utility model relates to the equally distributed type femoral bone end prosthesis of a kind of stress.

Background technology

At the prosthese of artificial hip joint replacing, after prosthese is implanted, easily produce the phenomenon of the loosening sinking of handle body, this is a more scabrous problem that is perplexing medical circle for a long time.After existing prosthese is implanted, the easy ankylose of part that femoral stem can make handle body and sclerotin combine closely under the even situation of suffered unbalanced stress, the gapped part of handle body and sclerotin can't ankylose, causes the handle body to produce in pulp cavity and becomes flexible sinking.

The utility model content

The purpose of this utility model is for overcome a kind of prosthese that can conveniently implant that above-mentioned defective provides in first displacement.

For achieving the above object, this utility model is taked following design:

Side adopts the convex design that certain radian is arranged before and after the handle body of stress uniform distribution type type femoral bone end prosthesis, the circular arc convex design is adopted in the left side, handle body and sclerotin can be combined closely, between handle body far-end and the spongy bone little clearance is arranged, combine closely by handle body near-end and sclerotin all around, make handle body near-end evenly stressed, help around the handle body the even ankylose with sclerotin, preventing effectively that the handle body is loosening sinks.Adopt hydroxyapatite coating layer at the femoral stem proximal part, help the ankylose of handle body and sclerotin.

The utility model has the advantages that:

1, this utility model stress uniform distribution type type femoral bone end prosthesis after adopting above design, by changing the shape of prosthese, effectively raises prosthesis stability.

2, this utility model stress uniform distribution type type femoral bone end prosthesis, its handle body proximal end face has hydroxyapatite coating layer, and this coating has the function of inducing the osteocyte growth.

3, this utility model stress uniform distribution type type femoral bone end prosthesis, it adopts medical metal to make, so it has excellent biological compatibility.

Description of drawings

Fig. 1 is this utility model perspective view

Fig. 2 is the example structure sketch map of this utility model postoperative user mode

The specific embodiment

Referring to shown in Figure 1, this utility model stress uniform distribution type type femoral bone end prosthesis, the front and back side of handle body 1 adopts projection 2 designs that certain radian is arranged, 3 designs of circular arc projection are adopted in the left side, handle body near-end can be combined closely with sclerotin on every side, make the suffered stress uniform distribution of near-end, preventing that the handle body is loosening sinks.

Handle body 1 proximal end face has the hydroxyapatite coating layer that can induce osteocyte to grow into, and this hydroxyapatite coating layer can adopt conventional plasma spraying method or electrochemical deposition method to make.

Claims

1. a stress uniform distribution type type femoral bone end prosthesis is characterized in that, the front and back side of handle body (1) adopts projection (2) design that certain radian is arranged, circular arc projection (3) design is adopted in the left side, can combine closely with sclerotin on every side, make handle body near-end evenly stressed, preventing that the handle body is loosening sinks.

2. stress uniform distribution type type femoral bone end prosthesis according to claim 1 is characterized in that, the quantity of the preceding posterior protrusion (2) of handle body (1) can design according to handle body dimensions.

3. stress uniform distribution type type femoral bone end prosthesis according to claim 1 is characterized in that, hydroxyapatite coating layer is adopted on handle body (1) surface.