title: Ring uncemented plastic on metal hip replacements--results from an independent unit.
abstract: We present 251 Ring uncemented plastic on metal (UPM) hip replacements with a follow-up of 2-5 years. Judging the functional results by the Harris hip evaluation for the surviving 234 hips, 79.8% were good to excellent, 11.7% fair, and 8.5% poor at an average of 3 years. The mortality within one month of surgery was 0.79%. There were 4 cases of deep infection (1.59%), 3 of which required excision arthroplasty. At 3 years, 6 hips (2.39%) had required revision, all for aseptic femoral loosening, 2 of which also had acetabular loosening. Ring UPM hip is both safe and reliable in the hands of many surgeons outside Ring's unit.
authors.affiliation: Department of Orthopaedic Surgery, St George's Hospital, London.
authors.forename: D W
authors.initials: DW
authors.lastname: Mok
authors.forename: K M
authors.initials: KM
authors.lastname: Bryant
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D005500:Follow-Up Studies; D006617:Hip Dislocation / Q000209:etiology; D006622:Hip Prosthesis / Q000401:mortality / Q000534:rehabilitation; D006801:Humans; D007431:Intraoperative Complications; D008297:Male; D008875:Middle Aged; D010523:Peripheral Nervous System Diseases / Q000209:etiology; D011183:Postoperative Complications / Q000453:epidemiology / Q000401:mortality; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012584:Sciatic Nerve