CN204909736U

CN204909736U - Artificial knee joint femoral prosthesis of coarse thin layer in modified area

Info

Publication number: CN204909736U
Application number: CN201520548438.3U
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen Yiheping Co Ltd
Priority date: 2015-07-27
Filing date: 2015-07-27
Publication date: 2015-12-30
Anticipated expiration: 2025-07-27

Abstract

The utility model relates to an artificial knee joint femoral prosthesis of coarse thin layer in modified area, characterized by is made by casting or forging, and rethread vibration material disk forms crude medical thin layer at femoral prosthesis with the corresponding surface that patient's sclerotin contacted. Because of casting and forging intensity and the mechanical properties who has guaranteed femoral prosthesis, rethread vibration material disk is coarse thin layer customization optimum roughness, and ability maximize ground is favorable to the bone to depend on or the bone is grown into. The utility model discloses it carries out bone total joint replacement surgery's use to be fit for the human knee joint pathological change.

Description

A kind of artificial knee-joint thighbone prosthese of the coarse thin layer of band of improvement

Technical field

This utility model relates to the artificial joint of medical science osteoarticular field, the artificial knee-joint thighbone prosthese of particularly a kind of improvement.

Background technology

Artificial knee-joint thighbone prosthese is body implant, the alternative being implanted in human femur under loading end when carrying out orthopaedics replacement operation is needed for human body knee joint pathological changes, make patient recover kneed physiological function to a certain extent, alleviating pain, improve motion and improve the quality of living.

In prior art, make artificial knee-joint thighbone prosthese by casting or forging, after form coarse thin layer through sandblasting at femoral prosthesis (1), or hydroxyapatite or titanium are formed coarse thin layer by thermal spraying at femoral prosthesis (1); Also artificial knee-joint thighbone prosthese and rough surface thin layer is made into integration by increasing material manufacture.But by casting and forge the artificial knee-joint thighbone prosthese of formation, the roughness on its surface is difficult to customization, is unfavorable for that bone depends on or Bone Ingrowth, after using certain hour, has loosening possibility, adds the mortality of replacement, the physiological load of making patients.The artificial knee-joint thighbone prosthese be made into integration by the manufacture of increasing material is inadequate because of manufacturing technology Maturity, can not ensure mechanical property and the mechanical strength of femoral prosthesis, causes the risk having fracture and second operation in implant.

Summary of the invention

The purpose of this utility model is the artificial knee-joint thighbone prosthese providing a kind of improvement, under the prerequisite ensureing mechanical property and mechanical strength, the surface roughness with Bone Ingrowth can be depended on, the defect easily loosening after overcoming existing artificial knee-joint thighbone Using prosthesis and may rupture for the most applicable bone of femoral prosthesis customization.

Task of the present utility model realizes by this way:

A kind of artificial knee-joint thighbone prosthese, first makes by casting or forging, then is manufactured on femoral prosthesis (1) by increasing material and forms coarse medical thin layer (2), and customizes optimum surface roughness for this coarse thin layer.

Can according to the sclerotin difference of patient and biomechanics requirement, for patient customizes coverage rate and the surface roughness of coarse thin layer.

Coarse medical thin layer (2) is distributed in the respective surfaces that femoral prosthesis (1) contacts with patient's sclerotin, can cover the surface of 1% ~ 99%;

The average surface roughness Ra scope of coarse medical thin layer (2) is 3.2 ~ 1250.

Advantage of the present invention is: this utility model makes artificial knee-joint thighbone prosthese by casting or forging, and ensure that intensity and the mechanical property of femoral prosthesis.Be fabricated to coarse medical thin layer (2) by increasing material again and customize optimum surface roughness, bone can be conducive to substantially and depend on and Bone Ingrowth.

Accompanying drawing explanation

Fig. 1 is this utility model example structure schematic diagram (wherein coarse thin layer is distributed in the part surface of femoral prosthesis).

Detailed description of the invention

As shown in Figure 1, this utility model provides a kind of artificial knee-joint thighbone prosthese, makes by casting or forging.Then set up the coarse thin film model with optimum surface roughness (such as Ra=400) in a computer, then by laser or high-power electron beam melting medical powder, this artificial knee-joint thighbone prosthese obtains required coarse thin layer.

Claims

1. the artificial knee-joint thighbone prosthese of the coarse thin layer of band improved, is characterized in that making by casting or forging, then is manufactured on femoral prosthesis (1) and goes up the respective surfaces contacted with patient's sclerotin by increasing material and form coarse medical thin layer (2); The coverage of this coarse medical thin layer (2) can customize, and is distributed in the respective surfaces that femoral prosthesis (1) contacts with patient's sclerotin, can covers the surface of 1% ~ 99%; The surface roughness of this coarse medical thin layer (2) can customize, and average surface roughness Ra scope is 3.2 ~ 1250.