But from clinical observations, there still remain two problems as follows: (1) bone marrow cavity is contaminated by debris from joint wear, and then followed by osteolysis;

• 在临床观察中发现，人工髋关节仍有下列两项不良的问题：经磨耗产生之碎屑侵入骨髓腔而造成骨溶解；