title: Is second generation metal-on-metal primary total hip arthroplasty with a 28 mm head a worthy option?: a 12- to 18-year follow-up study.
abstract: To determine whether MoM THA with a small head is still worthy of use, we investigated survivorship, complications, and factors influencing failure. Of 149 consecutive patients (195 hips), 141 (180 hips) of mean age 43 (19-55) years were available for review at a mean of 14.4 years postoperatively. Survivorship for cup revision for any cause was 97.8% at 18.4 years postoperatively. Nine hips generated complaints of groin pain; six showed periacetabular osteolysis, one had pain without radiological change, and two were diagnosed as symptomatic pseudotumors. Four of six hips with periacetabular osteolysis or aseptic loosening were revised. Surgery- and patient-related factors had no effect in results. Our results are encouraging, however, further study will be necessary to determine the incidence and fates of pseudotumors after MoM THA with a small head.
authors.affiliation: Department of Orthopaedic Surgery, Hanyang University Hospital, Seoul, South Korea.
authors.forename: Kyu-Tae
authors.initials: KT
authors.lastname: Hwang
authors.forename: Young-Ho
authors.initials: YH
authors.lastname: Kim
authors.forename: Yee-Suk
authors.initials: YS
authors.lastname: Kim
authors.forename: Il-Yong
authors.initials: IY
authors.lastname: Choi
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation*; D001672:Biocompatible Materials; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D007592:Joint Diseases / Q000175:diagnosis / Q000601:surgery*; D008297:Male; D008670:Metals; D008875:Middle Aged; D011474:Prosthesis Design; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D008670:Metals
keywords: metal on metal; pseudotumor; small head; survivorship; total hip arthroplasty