CN2118508U

CN2118508U - Carbon-titanium combined artificial thighbone

Info

Publication number: CN2118508U
Application number: CN 91233139
Authority: CN
Inventors: 陈兰田; 刘培桐; 江昆源
Original assignee: JILIN CENTURAL HOSPITAL
Current assignee: JILIN CENTURAL HOSPITAL
Priority date: 1991-12-30
Filing date: 1991-12-30
Publication date: 1992-10-14

Abstract

The utility model discloses a carbon-titanium combined artificial thighbone, belonging to the field of medical artificial limbs. The artificial thighbone is composed of a carbon artificial thighbone and a titanium alloy metal handle, wherein, the thighbone is formed by using isotropic graphite materials as a basal body which is deposited on a silicon low-temperature pyrolysis isotropic carbon coat through a certain technology, and the titanium alloy metal handle is forged by FC4 titanium alloy after pressure forging. The combined part of the thighbone is filled and glued by bone cement. The place of the upper end of the titanium alloy metal handle cooperating with the carbon artificial thighbone is processed into a cut conical shape, the lower cross section of the titanium alloy metal handle is provided with an oval shaped step, both sides of the handle body are processed with concave handles, and the handle body are all processed into a semi-ball shaped salient point structure except the concave handle part. The carbon-titanium combined artificial thighbone has favorable mechanical strength, and stable chemical and physical property, light weight, favorable anti-abrasion and anti-corrosion property, and biocompatibility. The utility model is a preferred material of various artificial thighbones in the world at present.

Description

Carbon-titanium combined artificial thighbone

This utility model belongs to medical prosthesis body field.

Medical circle is fractured under the femoral head in surgical operation therapy at present, the disunion of old fracture of femoral neck, ischemic necrosis of femoral head hip joint osteoarthritis, the tumor of femoral head or femoral head and neck or tumor-like lesion, hip joint bony ankylosis due to the maincenter type rheumatoid arthritis and the hip joint bony ankylosis case due to other reasons, all adopt artificial strand first-class medical prosthesis body replace performing the operation in the femoral head of excision pathological changes.Majority state adopts titanium alloy in the world at present, rustless steel, and pottery, plastic or other material are manufactured artificial thigh bone and single glass.Prove that the artificial thigh bone that titanium alloy and stainless steel material are manufactured exists and is subjected to corruption in the human body for a long time through secular clinical experience, shortcoming such as metal is fatigue, electrolysis, to the human toxicity reaction greatly progressively, and the elasticity mill amount gap of metal and bone is bigger.Shortcomings such as the ceramic material artificial thigh bone exists pure property shortcoming such as fracture easily, and artificial strand of head of plastic material is easily aging, and the free state toxic reaction is big.And the artificial thigh bone that above-mentioned different materials is made structurally also exists not all roses situation, and biological fixation is bad, through occurring sinking after a while and loosening phenomenon, causes suffering to the patient once more.

The purpose of this utility model has been invented a kind of carbon one titanium combined type artificial femoral head at above-mentioned several situations.This carbon one titanium combined type artificial femoral head has excellent mechanical intensity, chemical property and stable physical property, light weight, withstand voltage, wear-resisting, corrosion-resistant, good biocompatibility, and energy and body combine rightly, biological fixation is good, is the classic first-selected pseudocolloid of various in the world artificial thigh bonees at present.

The technical solution of the utility model is to realize like this, adopted artificial femur head of carbon and titanium alloy metal handle two parts to form the combined type artificial femoral head, artificial femur head of carbon is constituted in outer field siliceous low temperature pyrogenation isotropism carbon coating through certain process deposits by matrix with the isotropic graphite material, and the titanium alloy metal handle is with TC ₄Titanium alloy is forged through hot moulding and is caused shape technology, the shank upper end has avette step with the artificial femur head of carbon place of matching for its following cross section of truncated cone shape, handle body both sides are fluted, collodiaphyseal angle a＜140 °, the handle body is taper, handle body both side surface is a plurality of hemispherical bump structures, and there is a through hole at the angle on shank, and the metal handle ball can be processed into plurality of specifications by the different people height.

Figure of description is an example structure sketch map of technical solutions of the utility model.Fig. 1 is artificial femur head of carbon and titanium alloy metal handle combinative structure sketch map, Fig. 2 is artificial femur head of carbon and the titanium alloy metal handle structural representation that stretches tight for Fig. 1, Fig. 2 is the A-A cross section view of Fig. 1, Fig. 3 is the B-B profile of Fig. 1, and Fig. 4 is the C-C cross section view of Fig. 1, and Fig. 5 is the right view of Fig. 6, Fig. 6 is the complete golden metal handle structural representation front view of titanium, Fig. 7 is the right view of Fig. 6, and Fig. 6 is a titanium alloy metal handle structural representation front view, and Fig. 7 is the vertical view of Fig. 6.

Enforcement illustration below in conjunction with the technical program further is illustrated this utility model structure and clinical user mode:

Carbon one titanium combined type artificial femoral head is made up of metal handle (3) two parts of artificial femur head of carbon (1) and titanium alloy, and the joint portion is bonding with bone cement (4) (acrylic compounds cement) filling.The truncated cone shape is processed into the artificial femur head of carbon place of matching in titanium alloy metal handle upper end (2), it is 1:20 that present embodiment is selected tapering, following handle cross section has avette step (7) and prevents sinking with bone grafting in the Rhizoma Atractylodis Macrocephalae, and the angle is processed with a through hole (8) with adjusting in the Rhizoma Atractylodis Macrocephalae and taking out prosthese usefulness on shank.The metal handle surface smoothness is had relatively high expectations, handle body both sides be processed with groove (5) with prevent behind the bone grafting metal handle and femur loosening with sink.The technical program embodiment metal handle (3) collodiaphyseal angle is selected a＜140 °.The handle body of metal handle (3) is processed into taper, and handle body both side surface is processed as hemispherical bump structure (6) except that groove part, played fixation biology behind the bone grafting, when preventing human motion loosening with sink.

At first excise the femoral head of pathological changes in the clinical operation, from acetabular bone, take out.Filed the pulp cavity of femoral head epimere with special pulp cavity file (15), select the titanium alloy metal handle (3) of different model to squeeze in the femoral head pulp cavity according to different heights then, aligned the position of titanium alloy metal handle, the a spot of bone cement (4) of packing in the carbonaceous femoral head taper hole afterwards is fixed on the titanium alloy metal handle, treat carbon one titanium combined type artificial femoral head to be reset on the acetabular bone after bone cement solidifies, sew up, perform the operation and finish.Be only limited to the case on surface when the pathological changes that runs into femur head necrosis, changing this single glass only needs excision femoral head lesion surface not hinder healthy bone, during operation tetanic joint is chiseled, fix acetabular bone and strand head, vertically cut a hole into tunnel, two roads with the full bone cement of Carbonaceous single cup concave surface on the femoral head surface, also full bone cement in tunnel, two roads simultaneously is enclosed within on the femoral head the unnecessary bone cement of pressurization and gas according to the fixed position and is got rid of by the through hole on single glass, treat to reset after bone cement solidifies, suture operation eventually.

Claims

1, a kind of carbon-titanium combined type artificial femoral head is characterized in that:

A, carbon-titanium combined type artificial femoral head are made up of metal handle (3) two parts of artificial femur head of carbon (1) and titanium alloy, and the joint portion is bonding with bone cement (two olefin(e) acid class cement) filling;

B, artificial femur head of carbon (1) are to be matrix with the isotropic graphite material, separate the isotropism carbon coating through certain process deposits in outer field siliceous low grade fever temperature and constitute;

The metal handle of c, titanium alloy is with FC ₄Titanium alloy forges and makes through hot moulding;

The truncated cone shape is processed into the artificial femur head of carbon place of matching in d, titanium alloy metal handle upper end (2), following cross section has avette step (7), an angle processing through hole (8) on shank, handle body both sides are processed with groove (5), the handle body of metal handle (3) is processed into taper, handle body both side surface is processed hemispherical bump structure (6) except that the groove position.