Restoration of acetabular bone loss 2005.

The surgical strategy for revision of the acetabular component is determined by available host bone stock. Contained (cavitary) bone loss is the most common pattern of bone loss and can be addressed by morsellized bone graft. If contact can be made with at least 50% host bone, conventional uncemented cups can be used. If, however, contact with 50% host bone cannot be achieved, a protective cage and a cemented cup is an acceptable option but with a significant complication rate. The use of trabecular metal, which provides a more favorable environment for bone graft remodeling and host bone ingrowth, has allowed us to address larger contained defects without resorting to a cage. For massive contained defects, a combination of a trabecular metal cup protected by a cage has been used.