title: Revision total hip arthroplasty with a modular tapered stem.
abstract: Femoral stem revision surgery with proximal bone loss may be treated with modular uncemented distal fixation stems. Early results of the ZMR tapered stems with relatively fewer cases were encouraging. In this prospective study, we evaluated the 2 to 10 years survivorship, associated complications and functional outcomes of 84 cases of femoral revision using the ZMR tapered stem. The indications for revision were aseptic loosening (50), periprosthetic fracture (12), infection (17), stem fracture (4) and instability (1). The mean follow-up was 46 months (range, 25-117). The Kaplan-Meier survival with femoral re-revision for any reason as an end-point was 92.7% (95% CI: 87.7%-97.7%). The mean Harris hip score improved from 37 (10-77) points before operation to 72 (41-96) points at last follow-up. The ZMR tapered stem has shown satisfactory results in 2 to 10 years followup in various femoral stem revision conditions.
authors.affiliation: Orthopaedic Department, Mount Sinai Hospital, Toronto, Ontario, Canada. drorale@gmail.com
authors.forename: Dror
authors.initials: D
authors.lastname: Lakstein
authors.forename: Yona
authors.initials: Y
authors.lastname: Kosashvili
authors.forename: David
authors.initials: D
authors.lastname: Backstein
authors.forename: Oleg
authors.initials: O
authors.lastname: Safir
authors.forename: Paul
authors.initials: P
authors.lastname: Lee
authors.forename: Allan E
authors.initials: AE
authors.lastname: Gross
mesh_terms: D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D004867:Equipment Design; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D011446:Prospective Studies; D012086:Reoperation