CN202821718U

CN202821718U - Group matching femoral stem

Info

Publication number: CN202821718U
Application number: CN 201220014492
Authority: CN
Inventors: 李健
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2012-01-13
Filing date: 2012-01-13
Publication date: 2013-03-27
Anticipated expiration: 2022-01-13

Abstract

The utility model relates to a group matching femoral stem. A cone design at the proximal end of a stem body is in a taper cooperation with a distal-end sleeve. Accordingly, the demand of early-stage fixing can be met, the adjusting of an anteversion angle in an operation can be conducted in a more convenient and more visual way, and the risk of instability of the prosthesis after reset can be reduced. The anti-rotating wing of the straight stem body can effectively prevent the rotation of the prosthesis, and the quantity and height of the anti-rotating wing are designed based on the model of the straight stem body.

Description

Assembly type femoral stem

Technical field

This utility model relates to a kind of orthopaedics implant, and is particularly a kind of when hip replacement, more is applicable to the assembly type type femoral bone end prosthesis of the diseases (being called for short first hip) such as congenital hip dysplasia.

Background technology

For the prosthese of Replacement of Hip Joint, mainly exist prosthesis size larger, operation tool is complicated, and is higher to the operation specification requirement, and needs the problem of reprocessing after prosthetic loosening or the bony defect, and the prosthesis size when often overhauling is larger, and the osteotomy amount is also large.Existing structure such as Fig. 2 when running into first hip patient, when replacing larger prosthese, very easily cause the splitting of femur end cortical bone, and this problem is perplexing the putting to good use of replacement of first hip prosthesis always.So be badly in need of at present a kind of Novel thighbone handle, can fully guarantee formerly in the hip case, can fine solution fixation problem, a kind of femoral stem that reaches desirable surgical effect that again can be very desirable.

The utility model content

The purpose of this utility model is that defects provides a kind of formerly hip patient's Primary replacement or can effectively fix the assembly type prosthese that is difficult for making the femur splitting when overhauling in order to overcome.

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

The ingredient of assembly type prosthese femoral stem is comprised of near-end oversleeve and handle body two parts, such as Fig. 1.The fixation principle of this handle is to finish near-end by oversleeve to fix, and is finished partly by eight anti-rotors of handle body far-end band that far-end is anti-to be revolved, thereby reaching the effective front and back phase fixes.And handle body and oversleeve adopt the cone combo to close, and this handle can better be locked, such as Fig. 2 after little sinking.General first hip patient's pulp cavity near-end is thicker, and far-end is very narrow, so sufficient requirement is just bought in the design of this kind of handle, near-end uses oversleeve filling near-end thick, and handle body far-end adopts thinner far-end staight shank design, just can reach intact fixing, femur can not played splitting in the time of guaranteeing the implanting handle body again.

The beneficial effects of the utility model are:

This utility model assembly design mode prosthese, after adopting above design, cone combo by oversleeve and handle body is closed, efficiently solve the implantation difficulty of prosthese in the first hip operation process, thereby the risk that makes femur splitting in the art obtains effective solution, and the problem of prosthese stability in early stage has effectively been removed in the design of assembly type, can solve again the problem of prosthese later stage rotation with the design of eight anti-rotors.

This utility model design concept is advanced, simple in structure, fully uses the mechanical fasteners principle to guarantee the stable problem and the risk that has reduced femur splitting in the art in prosthese later stage.Formerly have good application and market prospect in the hip patient hip replacement surgery.

Below in conjunction with the drawings and specific embodiments this utility model is described in further details, present embodiment only is this utility model preferred forms, is not to restriction of the present utility model.

Description of drawings

Fig. 1 is handle body and the oversleeve schematic diagram of this utility model assembly type femoral stem

Fig. 2 is structural representation after the assembly of this utility model assembly type femoral stem

The specific embodiment

As shown in Figure 1, this utility model assembly type femoral bone end prosthesis, it adopts the design of the staight shank of (1) part, can make operation process simple, and to the specification requirement reduction of operation, the method that expands marrow is simpler; With can reach simultaneously fixing effect of far and near end after taper fit of (2) part.

And adopt eight ribs to prevent rotor (3) design at far-end, after prosthese is implanted, can obtain to fix good early stage and anti-revolving of later stage.

Claims

1. assembly type femoral stem, it is comprised of femoral stem (1) and oversleeve (2) two parts, it is characterized in that, and described oversleeve (2) is finished near-end and is fixed, and femoral stem (1) handle body distal portions finishes that far-end is anti-to be revolved.

2. a kind of assembly type femoral stem according to claim 1 is characterized in that, femoral stem (1) adopts cone to join the formula combination with oversleeve (2).

3. a kind of assembly type femoral stem according to claim 1 is characterized in that, adopts the design of staight shank type at femoral stem (1) handle body distal portions, with eight anti-rotors.