Cementless porous-coated anatomic medullary locking total hip prostheses.

摘要: Abstract The authors studied 50 consecutive and nonselected patients (52 hips) who were followed for a minimum of 7 years (range, 84–89 months) after they had primary total hip arthroplasty with an uncemented Anatomic Medullary Locking (DePuy, Warsaw, IN) system. average age the at operation was 47.6 19–88 years). operative diagnoses were: avascular necrosis femoral head in 18 hips (34%), osteoarthritis 16 (31%), fracture neck 14 (27%), miscellaneous 4 (8%). preoperative Harris score 59 points 6–67 points) that improved to 91 69–100 7-year follow-up examination. To assess adequacy intramedullary fit, fit stem proximal canal isthmus level evaluated. Forty-one (79%) good press-fit both level, five (10%) only, remaining six (11%) poor level. Of 46 and/or or 32 (70%) bone ingrowth (30%) stable fibrous tissue ingrowth. three (6%) another unstable. component loosening, one revised other two asymptomatic. There alarmingly high incidence perioprosthetic osteolysis our series: (31%) acetabular 13 (25%) only. Also, there strikingly polyethylene-liner wear (12 23%). Although loosening low, periprosthetic excessive polyethylene liner remain challenging problems insertion cementless prosthesis.