What we have learned about long-term cementless fixation from autopsy retrievals.

摘要: The current authors summarize insights gained from their experience studying uncemented porous-coated femoral and acetabular hip replacement components retrieved at autopsy. For components, autopsy studies showed that osseointegration occurs over an average 35% of the porous surface with most predictable ingrowth occurring near termination coating. bone pattern causes a remodeling pattern: overall decrease in mineral content (mean, 23% loss) on gradient loss proximally least distally. This regardless implant's level coating, mirrors strain reduction, because it is recognized easily, can be used by orthopaedists to distinguish between without standard radiographs. Studies also have shown more related characteristics implanted femur than any other variable. On side, unpredictable randomly. Although amount averaged 32%, ranged 3% 84%. Unfortunately, consistent pelvic has not been associated cup. Consequently, cannot determine radiographically whether component truly ingrown. Overall, contributed basic understanding histologic radiographic appearance osteointegrated implants confirmed durability this three-dimensional fixation even presence osteolysis.