CN2195306Y

CN2195306Y - Artificial femoral head

Info

Publication number: CN2195306Y
Application number: CN 94216703
Authority: CN
Inventors: 王尚福
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-07-12
Filing date: 1994-07-12
Publication date: 1995-04-26
Anticipated expiration: 2004-07-12

Abstract

The utility model discloses an artificial femoral head, which is composed of a femoral head body combined by a helmeted ball head, a femoral neck and a femoral collar, and a femoral head handle combined by a round table column and a handle rod. The bottom of the femoral head body is provided with an axial round table tunnel and a radial positioning slot. The shaft line included angle of the round table column and the handle rod is 120 DEG to 135 DEG; the lower part of the handle rod forms a cylinder shape, and the upper part is gradually wide-shaped tabular. The upper part tabular positions of the round table column and the handle rod are respectively inserted in the round table tunnel and the positioning slot for tightening. The utility model has the advantages of simple and reasonable structure, uniform and dispersed force, convenient process and installation, long service life, difficult damage, looseness or subsidence, etc.

Description

Artificial femoral head

This utility model relates to can be transplanted to intravital femoral prosthesis, especially a kind of artificial thigh bone.

Fracture of the femoral head is a kind of common injury, especially more in old people colony sees more.The best approach for the treatment of this injury is changed impaired femoral head.The artificial thigh bone that is used for changing at present has multiple, and what have damages or loosening, sinking because of unreasonable structure produces.Disclose a kind of " carbon one titanium combined type artificial femoral head " among the Chinese patent CN2118508u, it is made up of artificial femur head of carbon and titanium alloy handle two parts, and the joint portion is bonding with the bone cement filling.Titanium alloy handle upper end cooperates to cut the garden taper with artificial femur head of carbon, and following plane of structure has avette and removes, and there is recessed handle handle body both sides.Aspect stressed, exist certain defective behind this artificial thigh bone implant into body, the suffered pressure in its bulb acts on fully and cuts on the cone of garden, and oppress on femur by avette flange that removes, cause this two positions stress concentrated relatively, the titanium alloy handle is the taper obform body in addition, and institute plants prosthese and is easy to produce loosening and sinking.And the recessed handle of titanium alloy handle also makes troubles to processing.

The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art, provides a kind of simple and reasonable, stressed homodisperse, thereby not fragile, loosening or sinking, the artificial thigh bone that processing and installation facility and service life are long.

The purpose of this utility model can reach by implementing following technical proposal: offer platform duct, a garden in the femoral head body bottom that is constituted that combined as a whole by helmet shape bulb, neck of femur and taper femur neck along axis direction, its opening part has a radial locating slot.The top of femoral head handle is the garden important actor, and the angle of the handle rod axis of its axial line and bottom is 120～135 °.Garden important actor and handle bar top embed in platform duct, garden and the locating slot fastening in addition respectively.This utility model also can obtain better effect by implementing following technical measures: the bottom Design and Machining of femoral head handle bar is become the garden column, and its top is wide shape flat gradually, and shoulder be provided with one locating hole is installed so as to locate during operation technique, tractive; Angle the best between garden important actor axial line and handle rod axis is 130 °.

Accompanying drawing 1 is the Facad structure sketch map of this utility model embodiment.

Accompanying drawing 2 is the A-A cutaway view of this utility model embodiment accompanying drawing 1.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing.Femoral head body of the present utility model is made of helmet shape bulb 1, neck of femur 2 and femur neck 3 institute that combines as a whole from top to bottom, adopts high density intensified ceramic material through compression molding, high temperature sintering manufacturing.Offer platform duct, a garden 4 from its bottom along axis direction, and have radial detents 5 at its opening part.Be by the garden important actor 6 on top and be located at its underpart and be angle α and combine as a whole by 130 ° handle bar 7 and constituted by the femoral head handle of titanium alloy material manufacturing with its axial line.The bottom of handle bar 7 is the garden column, and its top is wide shape flat gradually, and shoulder also has one and installs with locating hole 8.During assembling, the flat position, top of the garden important actor 6 of femoral head handle and handle bar 7 embedded respectively fasteningly in addition in the platform duct 4, garden of femoral head body and the locating slot 5 just can.Behind this utility model implant into body, the human body gravity that the femoral head body is born passes to the flat position of garden important actor 6 and handle bar 7 tops of femoral head handle by platform duct 4, garden and locating slot 5, share to the human femur under loading upper end of supporting through the gradually wide shape flat body on handle bar 7 tops again, thereby make its stressed more homodisperse, overcome be easy to become flexible, the defective of sinking etc.This utility model carries out chemical analysis and mechanical performance through relevant department and detects and all reach and surpass the like product standard.Show good biocompatibility in animal and clinical practice test back, and function admirable such as wear-resisting, resistance to compression, do not have other bad phenomenon and take place.

The utility model compared with prior art, have simple and reasonable, stressed Uniform Dispersion, not fragile, loosening or sink, and processing and install convenient, the characteristics such as service life is long.

Claims

1, a kind of artificial thigh bone, comprise femoral head body and femoral head handle, it is characterized in that the femoral head body is by helmet shape bulb (1), neck of femur (2) and taper femur neck (3) combine as a whole constitute, have platform duct, a garden (4) from its bottom along axis direction, and be provided with radial detents (5) at its bottom opening place, the femoral head handle by the garden important actor (6) on top and be located at its underpart and its axial line to be angle α be that 120～135 ° handle bar (7) is formed, the top of garden important actor (6) and handle bar (7) embeds respectively among platform duct, garden (4) and the locating slot (5).

2, artificial thigh bone according to claim 1 is characterized in that the bottom of described handle bar (7) is the garden column, and top is wide shape flat gradually, and its shoulder is provided with one locating hole (8) is installed.

3, artificial thigh bone according to claim 1 and 2 is characterized in that angle α is 130 ° between the central axis of garden important actor (6) and femoral head handle bar (7).