| 摘要 |
<p>PURPOSE:To enable the production of the artificial joint which meets different sizes in a short period of time, has the high fitness to the residual bone and prevents the induction of a bone fracture by integrally forming a core part between an engaging part and a stem part and forming a sheath part to a separate body of a blank material which is lighter in weight than the core part and has a small Young's modulus. CONSTITUTION:The prosthetic part formed between the stem part 23 and the joint engaging part 21 consists of the core part 22b and the sheath part 22a. The core part 22b is made of a metal and is integrally formed of the stem part 23 and the engaging part 21. The sheath part 22a is formed of a high- polymer material, such as high-density polyethylene or polycarbonate resin, a light metallic material, such as pure titanium or titanium alloy, or rubber material, etc. This part is formed of the material which is lighter in weight than the core part 22b and has the small Young's modulus. As a result, the artificial joint member 2 is formed lighter than the conventional artificial joints and has the Young's modulus approximate to the Young's modulus of the residual bone. The member does not hinder walking and does not lead to the bone fracture.</p> |
