EXTENSIVELY COATED FEMORAL COMPONENTS IN YOUNG-PATIENTS

A review of 174 hips in 154 patients younger than 50 years of age who underwent primary total hip arthroplasty with a cementless acetabular component and an extensively coated femoral component done by one surg eon was performed to determine whether this method of fixation improve s the results of previously reported comparable series using different methods of fixation. The average age was 37.6 years, The average foll owup was 8.3 years (range, 2-13 years). Eighty-eight hips had at least 10 years followup. Sixteen (9%) hips had severe stress shielding. The re were 13 (7.5%) acetabular failures. Of 144 porous coated cups, thre e were revised for wear and one for dislocation, Another was revised 1 1 years postoperatively for late loosening secondary to catastrophic a cetabular lysis. Excluding the bipolar and threaded components (30 hip s), five (3.4%) porous coated cups were revised for failure, Of the 17 4 fully coated stems, 99.4% had stable fixation, 167 (96%) were ingrow n, six (3.4%) had stable fibrous fixation, and one (0.6%) was unstable , Two (1.1%) femoral stems were revised, The total rate of osteolysis was 4%. Cementless extensively porous coated stems and porous coated a cetabuli give excellent lasting results in young patients.