| 摘要 |
PURPOSE:To obtain the equal effect in supporting and fasting properties of a bioprosthetic material while eliminating complication of a production process by forming a surface structure with a fine space having an angle theta in a specified range at a surface section contacting a bone tissue in an artificial joint or a bone prosthetic member with a normal of the surface section as reference. CONSTITUTION:An artificial knee joint shank member 1 as bioprosthetic member is set on a shank T and a fine hole H is set on a surface 1a contacting an excised surface Ta of the shank T. The fine hole His at an angle theta ranging from 0 deg. to 60 deg. to a vertical line (x) of the surface 1a contacting a shank surface Ta and some thereof have an opposite inclination individually. Thus, a large resistance force is shown to a load F even when it works on a shank bone member 1. For example, the fine holes H are cut into the surface 1a of the shank member 1 respectively with a diameter of 0.3mm and 0.5mm and a death of 0.4mm and 0.6mm to make a fine space upon which the bone grows to encroach. The theta is set at 10 deg. clockwise and 10 deg. counterclockwise alternately. |
