CN203388967U

CN203388967U - Handle for artificial hip joint prosthesis

Info

Publication number: CN203388967U
Application number: CN201320374745.5U
Authority: CN
Inventors: 叶雷
Original assignee: Chongqing Runze Pharmaceutical Co Ltd
Current assignee: Chongqing Runze Pharmaceutical Co Ltd
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2014-01-15
Anticipated expiration: 2023-06-27

Abstract

The utility model relates to a handle for an artificial hip joint prosthesis. The handle comprises a cervical port (1), a handle neck (2) and a handle body (3) and is characterized in that the cervical port (1), the handle neck (2) and the handle body (3) are integrally molded by medical titanium alloy; the outer surface of the handle body (3) is also provided with a porous tantalum part layer (4); the surface of the porous tantalum part layer (4) is also provided with at least one groove (5) which extends to the lower end of the handle body (3) from the upper end of the handle body (3). The handle has the characteristics that the structure is simple, reasonable and stable, air and blood and the like are conveniently discharged, the mechanical property is similar to that of the human bone, the matching with the skeleton of a human body is strong and the biocompatibility is good and the like.

Description

A kind of artificial hip prosthesis's handle

Technical field

This utility model relates to the artificial joint in medical domain, relates in particular to a kind of artificial hip prosthesis's handle.

Background technology

Along with the aggravation of aged tendency of population, degeneration osteoarthritis dysfunction increases year by year, and such patient conventionally need to accept Replacement of Hip Joint and be treated.Replacement of Hip Joint has become the mature technology for the treatment of hip joint disease in whole latter stage.Fat embolism syndrome is one of hip replacement common complication, and small fat drop can enter the Arterial system of body circulation by pulmonary capillary, cause pulmonary circulation and respiratory dysfunction, and severe patient can cause death.At present very inconsistent for the incidence rate bibliographical information of the postoperative fat embolism syndrome post of joint replacement, be 1%～30%.The key factor of bringing out fat embolism syndrome is the intrinsic pressure rising of marrow.While expanding marrow or first hip replacement, marrow is intrinsic pressure can be increased to respectively 760mmHg and 1000mmHg, cause in pulp cavity fat, myeloid tissue even bone bits enter blood circulation, form the thromboembolism of internal organs.

According to the fixing mode of artificial joint, the artificial hip prosthesis who uses clinically at present can be divided into bone cement stationarity prosthese and none-cement fixed pattern prosthese.This two large class artificial hip prosthesis conventional has bright finish standard shank, Margarita standard shank etc., Chinese patent literature CN02271916.4, May 28 2003 day for announcing, another kind of artificial hip prosthesis's handle is also disclosed, this artificial hip prosthesis's handle is to design some levels from top to bottom and the zigzag fin of mutual equidistant balance on the surface of existing artificial hip joint stem handle body near-end, can prevent artificial hip joint stem easily loosening and sinking in human femur under loading pulp cavity, improve the stability after artificial hip joint stem is implanted.When but such artificial hip prosthesis's handle inserts near end of thighbone, each side and femur laminating are all comparatively tight, air in femoral bone cavitas medullaris, blood etc. are discharged difficulty, easily cause the pressure in femoral bone cavitas medullaris obviously to increase, greatly improved the incidence rate of fat embolism syndrome, and its structure setting and select the certain defect of existence, cause it after long-time use, to there will be repulsion with tissue, biocompatibility is poor and affect its service life.Also once someone proposes central authorities at artificial hip prosthesis's handle and opens one and connect upper and lower through hole and play aerofluxus and reduce the intrinsic pressure effect of marrow, but the angle from biomechanics, in the central openings of prosthesis handle, can affect the intensity of prosthesis handle, and processing technology difficulty is larger.Therefore, need a kind of discharges such as air, blood of being convenient to badly, can not increase femoral bone cavitas medullaris internal pressure, keep prosthesis handle intensity in prior art, and the simple artificial hip prosthesis's handle of processing technology, but about this class prosthesis handle, have not been reported at present.

Utility model content

The purpose of this utility model is to provide a kind of artificial hip prosthesis's handle, and this hip prosthesis handle structure advantages of simple is stable, is convenient to the discharges such as air, blood, the similar people's bone of mechanical property, and have good biocompatibility concurrently.

The purpose of this utility model is achieved in that

A handle, it includes cervical vertebra mouth, handle neck and handle body, it is characterized in that: described cervical vertebra mouth, described handle neck and described handle body are that medical titanium alloy is one-body molded; The outer surface of described handle body is also provided with one deck porous tantalum product layer, and the surface of the porous tantalum product layer of this setting is also provided with at least one groove, and this groove Cong Bingti upper end extends to described Bing Ti lower end.

The porous tantalum product layer that above-mentioned handle external surface arranges, its porosity is 60～70%.This porous tantalum product layer, can adopt the preparations such as foam dipping method, die pressing.Through the discovery that studies for a long period of time: the handle body that adopts this porous tantalum product layer, the structure of growing in making bone grow into form, organically combine as a whole with body bone tissue, when greatly having improved the biocompatibility of this artificial joint, also well met its mechanical property, greatly improved its service life and implanted comfort level, having increased stability and anti-verticity after prosthese is implanted.

The degree of depth of above-mentioned groove is 1～3mm, be preferably 2mm, this groove is when discharging the materials such as air in femoral bone cavitas medullaris, blood, and the pressure in femoral bone cavitas medullaris can obviously not increase, the incidence rate of fat embolism syndrome will obviously decline, and this degree of depth is more shallow can not affect overall depth.

The utlity model has following beneficial effect:

This hip prosthesis Bing side is provided with groove, and when it inserts near end of thighbone, the air in femoral bone cavitas medullaris, blood etc. can be discharged in time along groove, and the pressure in femoral bone cavitas medullaris can obviously not increase, and the incidence rate of fat embolism syndrome will obviously decline.When it thoroughly inserts after near end of thighbone, can also from groove, along femur wall, fill in a certain amount of spongy bone, attach better.In addition, its handle is external has the porous product layer that can make bone grow into, and the hole on rough external surface can make new bone inwardly grow, the structure of growing in formation, organically combines as a wholely with body bone tissue, reaches real biological fixation, increase stability and anti-rotatory, improved blood supply effect.This hip prosthesis handle simplicity of design, is convenient to modeling, and processing technology is simple, is suitable for generally promoting the use of.

Accompanying drawing explanation

Fig. 1 is the overall structure schematic diagram of the hip prosthesis handle in this utility model embodiment 1.

Fig. 2 is the A-A cutaway view of Fig. 1.

The specific embodiment

Be below this utility model preferred embodiment, and be not intended to limit protection domain of the present utility model.

Embodiment 1

As shown in Fig. 1～2: a kind of artificial hip prosthesis's handle, it includes cervical vertebra mouth 1, handle neck 2 and handle body 3; Its cervical vertebra mouth 1, handle neck 2 and handle body 3 are that medical titanium alloy is one-body molded; The outer surface of handle body 3 is also provided with one deck porous tantalum product layer 4, this porous tantalum product layer 4 adopts foam dipping legal system standby, its thickness is 5mm, its porosity is 60～70%, and on the surface of this porous tantalum product layer 4, being also equipped with the degree of depth is two grooves 5 of 2mm, and this groove 5 extends to the lower end of handle body 3 from the upper end of handle body 3.

The utlity model has simple and reasonable stablizing, be convenient to the discharges such as air, blood, the similar people's bone of mechanical property, strong with skeleton matching, has the good features such as biocompatibility concurrently.

Claims

1. artificial hip prosthesis's handle, it includes cervical vertebra mouth (1), handle neck (2) and handle body (3), it is characterized in that: described cervical vertebra mouth (1), described handle neck (2) and described handle body (3) for medical titanium alloy one-body molded; The outer surface of described handle body (3) is also provided with one deck porous tantalum product layer (4), and the surface of the porous tantalum product layer (4) of this setting is also provided with at least one groove (5), this groove (5) extends to the lower end of described handle body (3) from the upper end of handle body (3); The porous tantalum product layer (4) that described handle body (3) outer surface arranges, its porosity is 60～70%.