Are cementless acetabular components the cause of excess wear and osteolysis in total hip arthroplasty

摘要: The authors reviewed 175 primary cementless Biologic Ingrowth Anatomic System stem total hip arthroplasties with average followup of 7 years for wear and osteolysis. Group I (24 hips : fixed titanium heads, cemented polyethylene cups) had a rate 0.10 mm per year, lysis 0%. II (62 metal-backed 0.13 31%. III (15 0.25 87%. IV (74 modular cobalt chromium 0.17 24%. Wear was associated younger age male patients, but not thickness. Age, gender, weight, component stability no effect on osteolysis rates. the statistically highest rate. lowest Therefore, features acetabular cups, such as screw holes, roughness metal shell, locking mechanism, may cause increased