When more than half of the acetabular component is in contact with graft, bone ingrowth is unpredictable for a cementless implant, and cement fixation alone has a high long-term failure rate.

• 当髋臼假体有一半以上与移植骨接触时，则无法预料无骨水泥固定假体的骨长入，而用骨水泥固定其长期失败率又相当高。