CN201394098Y

CN201394098Y - Artificial hip joint fused femoral stem

Info

Publication number: CN201394098Y
Application number: CN 200920157436
Authority: CN
Inventors: 张卫平
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2009-06-01
Filing date: 2009-06-01
Publication date: 2010-02-03
Anticipated expiration: 2019-06-01

Abstract

The utility model relates to an artificial hip joint fused femoral stem, which comprises a head, a neck and a handle body, wherein the handle body is composed of three-dimensional mesh structure or partially composed of three-dimensional mesh structure, wherein all units of the mesh are mutually communicated, holes at the appropriate position of the handle body are filled with autologous or xenogenous broken bone granules, after the implantation surgery, the external bony tissues are penetrated into the three-dimensional mesh and fused and integrated with the broken bone granules in the holes,thus effectively prevent the loosening between the artificial hip joint fused femoral stem prosthesis and the bone for long.

Description

Artificial hip joint bone fusion femoral stem

Technical field

This utility model relates to a kind of artificial hip joint bone fusion femoral stem.

Background technology

The artificial hip joint replacing operation has become a kind of common relatively surgical operation in medical circle at present, but how remaining on stable in the femoral bone cavitas medullaris as the implant femoral stem of femur and remain an everyway in the problem of constantly exploring. the progress along with industrial technology in recent years constantly has novel handle body to occur, for example at handle surface pyrolytic coating alloy powder, the pyrolytic coating biological ceramic powder, the sintering metal microballon, machining goes out groove, concavo-convex rough surface or the like, its main purpose is exactly to increase the contact area of femoral stem body and sclerotin and frictional force to delay the generation that the handle body becomes flexible, but because the caused molten ossein of chip that the articular surface long term wear comes off causes the atrophy of osteocyte degeneration still inevitable, so the loosening handle body that still might cause of the disengaging in gap, interface is implanted ultimate failure between femoral stem body and sclerotin.

The utility model content

Thereby the purpose of this utility model is to provide a kind of artificial hip joint femoral shaft that can prevent long-term loosening by femoral stem handle body and osseous tissue fusion for overcoming above-mentioned defective.

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

A kind of artificial hip joint bone fusion femoral stem includes head, cervical region and handle body, it is characterized in that the handle body can be all or locally be made of the three dimensional network pore structure, and this three dimensional network pore structure can be a monolayer, also can be multiwalled.

The utility model has the advantages that:

1, this utility model artificial hip joint bone fusion femoral stem, it includes head, cervical region and handle body, described handle body all or locally be made of the three dimensional network pore structure, wherein be interconnected between each unit of mesh, this three dimensional network pore structure can be a monolayer, also can be multiwalled, can reserve hole in handle body appropriate location and be used to fill broken osseous granules from body or allosome, operation is implanted the back by the time the infiltration of outside osseous tissue is grown into three-dimensional mesh and and handle body opening hole in the broken osseous granules fusion growth of filling can reach after being integral and prevent to take place between artificial hip joint bone fusion femoral stem prosthese and sclerotin loosening effect long-term effectively.

2, this utility model artificial hip joint bone fusion femoral stem, the whole or local outer surface of its handle body has hydroxyapatite coating layer, has the function of inducing the osteocyte growth.

3, this utility model artificial hip joint bone fusion femoral stem, it uses medical metal or bioceramic to make, so it has good biocompatibility.

Description of drawings

Fig. 1 is that this utility model handle body all is the embodiment sketch map of three dimensional network pore structure

Fig. 2 is that big of this utility model handle body is the embodiment sketch map of three dimensional network pore structure

Fig. 3 is that this utility model handle body near-end part is the embodiment sketch map of three dimensional network pore structure

Fig. 4 is that this utility model handle body far-end part is the embodiment sketch map of three dimensional network pore structure

Fig. 5 is that this utility model handle body far-end part is another embodiment sketch map of three dimensional network pore structure

Fig. 6 leaves the embodiment sketch map of pore space structure for this utility model handle body part

Fig. 7, Fig. 8 are the local enlarged diagram of three dimensional network pore structure

The specific embodiment

Below in conjunction with accompanying drawing concrete enforcement of the present utility model is described in further details.

As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, femoral stem with three dimensional network pore structure is divided into head (1), cervical region (2), handle body (3), position according to the close head of common convention handle body is called near-end, position away from head is called far-end, because the good degree difference of patient's sclerotin and the needs of biomechanics, but this utility model artificial hip joint bone fusion femoral stem handle body (3) can be local or all be made of three dimensional network pore structure (4), combine effect in the hope of reaching best sclerotin with the handle body, as Fig. 7, this three dimensional network pore structure shown in Figure 8 can be (6) of monolayer, also can be multiwalled (7), cross sectional shape to mesh does not have particular requirement, the hole (5) that can reserve in handle body appropriate location as shown in Figure 6, can in hole (5), be packed into the patient during operation from body bone or allograph bone and the pharmaceutical preparation that can induce osteocyte growth, so that better reach the effect of handle body and bony fusion.The common processing method of this utility model artificial hip joint bone fusion femoral stem is that the femoral stem physical model of setting up the three dimensional network hole surface in electronic computer adopts laser or high-power electron beam processing method melt molding then, can also with methods such as spark machined, chemical attack cast or the femoral stem blank of forging molding on etching, erode away needed mesh, also can obtain required mesh-structured in addition with powder sintering method.This utility model artificial hip joint bone fusion femoral stem should use the material manufacture with good biocompatibility, medical metal for example, bioceramic etc.At first patient's femoral bone cavitas medullaris is cleared up plastotype operation Shi doctor with specific purpose tool, with specific purpose tool the artificial hip joint bone fusion femoral stem of the present invention is squeezed into pulp cavity to the precalculated position then, make the interior sclerotin of three-dimensional mesh (4) and pulp cavity tightly push applying, postoperative treats that sclerotin three-dimensional mesh (4) the back femoral stem of growing into gradually will obtain to stablize good long term preventing and become flexible, hole (5) can be reserved in this external handle body appropriate location, can in hole (5), be packed into during operation the patient from the broken osseous granules of body or allosome and the pharmaceutical preparation that can induce the osteocyte growth in the hope of promoting bone tissue growth.

This utility model artificial hip joint bone fusion femoral stem forms with the material manufacture with good biocompatibility, as medical metal or bioceramic etc.Each surface that contacts with sclerotin has hydroxyapatite coating layer, and this hydroxyapatite coating layer can adopt conventional plasma spraying method or the heavy collection method of electrochemistry and sintering process to form.

Claims

1, a kind of artificial hip joint bone fusion femoral stem, it is characterized in that, he comprises head (1), cervical region (2), handle body (3), handle body (3) can be all or locally is made of three dimensional network pore structure (4), described three dimensional network pore structure (4) is interconnected between each unit, and the cross sectional shape of this three dimensional network pore structure (4) does not have particular requirement.

2, artificial hip joint bone fusion femoral stem according to claim 1 is characterized in that, reserves the hole (5) that is used to implant broken osseous granules in handle body (3) appropriate location.

3, artificial hip joint bone fusion femoral stem according to claim 1 is characterized in that, described three dimensional network pore structure (4) can be (6) of monolayer, also can be multiwalled (7), and the cross sectional shape of three dimensional network pore structure (4) does not have particular requirement.。

4, artificial hip joint bone fusion femoral stem according to claim 1 is characterized in that, it adopts medical metal, bioceramic manufacturing.

5, artificial hip joint bone fusion femoral stem according to claim 1 is characterized in that, each surface that handle body (3) contacts with sclerotin has hydroxyapatite coating layer.