| 摘要 |
<p>PURPOSE:To form an acetabular socket not generating distortion and damage at all and having extremely high reliability, by arranging a large number of projections to a socket backed by a metal and holding a plastic body formed of HDP plastic to extremely low temp. to insert the same under pressure at the ambient temp. CONSTITUTION:In a method for preparing an acetabular socket consisting of the outer frame body fixed to the hipbone by cement and a plastic body wherein a condyle sphere is held to the outer frame body in a freely slidable manner, when a plastic main body 1 is cooled by liquid nitrogen, the HDP plastic main body can be easily inserted in the socket 2, wherein projections each having a height of 0.6mm are arranged to the inside thereof on the circumference circle thereof, under pressure. The HDP plastic main body 1 expands at the ambient temp. and the projections of the socket 2 are penetrated in the soft HDP plastic main body to develop fall-out preventing action. Pressure is removed to take out the whole from a jig and sterilization treatment by the irradiation with gamma-rays of 2.5MR is performed to prepare the acetabular socket.</p> |
