Endosteal erosion in association with stable uncemented femoral components.

摘要: Sixteen cases of patients who had focal femoral osteolysis after total hip replacement without cement were identified. Fourteen them included in a retrospective review 474 consecutive replacements 441 been followed for at least two years. The criteria inclusion the study with component that appeared stable radiographically, and no subsidence or change position implant. All but men quite active. average age was forty-seven years (range, twenty to sixty-five years). sixteen an excellent clinical result (a Harris score 90 points more). In patients, revised and, third, biopsy done. all three implant found be firmly fixed femur. hips revised, extensive ingrowth bone demonstrated histologically, there evidence infection, well defined fibrous membrane around smooth portion stem. histological specimens from these contained aggregates macrophages particulate polyethylene metallic debris. material not fine lined cystic cavity. Although occasional macrophage, foreign Trabecular microfracture osteoclastic resorption seen next lining. With one exception, identified less than postoperatively. most This showed can occur uncemented components.