CN201806801U

CN201806801U - Furcal femoral handle

Info

Publication number: CN201806801U
Application number: CN 201020537256
Authority: CN
Inventors: 李健
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: 2011-04-27
Anticipated expiration: 2020-09-21

Abstract

The utility model relates to a furcal femoral handle. In the furcal femoral handle, the risk of splitting far ends of femurs is reduced by the furcal design of a straight handle body, the width of a furcal structure is a constant value, and the length can be designed according to the model of the straight handle body. Anti-rotor wings of the straight handle body can prevent prosthesis from rotating effectively, and the number and height of the anti-rotor wings are designed according to the model of the straight handle body.

Description

The branch type femoral stem

Technical field

This utility model relates to a kind of orthopaedics implant, and is particularly a kind of when hip replacement, makes distal femur be difficult for the biotype prosthese of splitting.

Background technology

At the prosthese of artificial hip joint near-end fixed form, mainly exist prosthesis size bigger, the operation tool complexity, higher to the operation specification requirement, and need the problem of reprocessing after prosthetic loosening or the bony defect, and the prosthesis size when often overhauling is bigger, and the osteotomy amount is also big.Existing structure such as Fig. 2, when the bigger prosthese of displacement, very easily the cortical bone to distal femur causes very big pressure, causes thigh pain or causes the splitting of distal femur cortical bone, and this problem is perplexing the putting to good use of replacement of prosthese always.So be badly in need of a kind of novel femoral stem at present, can fully guarantee in art, to reduce the non-risk of distal femur splitting in the hip replacement, again can be after displacement can be for a long time at the human body internal fixation and tight prosthese, thereby improve the service life of hip prosthesis in human body.

The utility model content

The purpose of this utility model is to provide a kind of can be difficult for making distal femur splitting prosthese when replacing or overhauling for the first time for overcoming above-mentioned defective.

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

A kind of branch type femoral stem is characterized in that: it is made up of awl end, neck, conical grip body and staight shank handle body (1); Staight shank handle body (1) is made up of bifurcation structure (2) and anti-rotor (3); The length of bifurcation structure (2) is 30mm, and the width of bifurcation structure (2) is fixed value 1.5mm; The opening surface of bifurcation structure (2) is parallel to the collodiaphyseal angle place face of handle body; The quantity of the anti-rotor of staight shank handle body (1) is 8, highly is 1mm.

The far-end of branch type prosthese femoral stem adopts dichotomous design, new structure as shown in Figure 1, after prosthese is implanted, can produce the deformation of the anterior arch that adapts to femur along with the shape of pulp cavity, as shown in Figure 3, when pulp cavity reduces, because staight shank handle body portion has bifurcated, can under the situation of pressurized, shrink to the centre, reach the purpose that reduces distal diameter, can effectively prevent the generation of the bone splitting situation of distal femur, and dichotomous design has reduced the rigidity of prosthese, can effectively alleviate the pulp cavity internal pressure, postoperative thigh pain has and significantly alleviates or eliminate.Staight shank handle body adopts anti-rotor design, can effectively prevent the rotation of prosthese after prosthese is implanted.

The beneficial effects of the utility model are:

This utility model branch type femoral stem, owing to adopt above design, by changing the rigidity of prosthese, effectively alleviated in the operation process prosthese to the extruding of distal femur pulp cavity, distal femur splitting and postoperative thigh pain obtain effective solution in the art thereby make, and the loosening problem of prosthese later stage rotation has effectively been removed in the design of anti-rotor.

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

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 qualification of the present utility model.

Description of drawings

Fig. 1 is the structural representation of this utility model branch type design femoral stem

Fig. 2 is borrowed structure sketch map commonly used

Fig. 3 is the embodiment sketch map of this utility model branch type design femoral stem

The specific embodiment

As shown in Figure 1, this utility model branch type femur, it adopts the staight shank type design of staight shank handle body 1, and operation process is simplified, to the specification requirement reduction of operation.As shown in Figure 3, the bifurcation design of staight shank handle body 2 after implanting pulp cavity, can have deformation significantly, reduces the prosthese rigidity, thereby prosthese is effectively alleviated the pressure in the pulp cavity, causes in the operation process, and the situation of the splitting of distal femur is contained.Staight shank handle body 1 adopts anti-rotor 3 designs of many ribs, can obtain fixing and anti-revolving of later stage in good early stage after prosthese is implanted.

Claims

1. branch type femoral stem is characterized in that: it is made up of awl end, neck, conical grip body and staight shank handle body (1); Staight shank handle body (1) is made up of bifurcation structure (2) and anti-rotor (3); The length of bifurcation structure (2) is 30mm, and the width of bifurcation structure (2) is fixed value 1.5mm; The opening surface of bifurcation structure (2) is parallel to the collodiaphyseal angle place face of handle body; The quantity of the anti-rotor of staight shank handle body (1) is 8, highly is 1mm.