Primary stability of a short bone-conserving femoral stem: a two-year randomized controlled trial using radiostereometric analysis

The Bone & Joint Journal
R J FergusonS Glyn-Jones

Abstract

The aim of this study was to determine the stability of a new short femoral stem compared with a conventional femoral stem in patients undergoing cementless total hip arthroplasty (THA), in a prospective randomized controlled trial using radiostereometric analysis (RSA). A total of 53 patients were randomized to receive cementless THA with either a short femoral stem (MiniHip, 26 patients, mean age: 52 years, nine male) or a conventional length femoral stem (MetaFix, 23 patients, mean age: 53 years, 11 male). All patients received the same cementless acetabular component. Two-year follow-up was available on 38 patients. Stability was assessed through migration and dynamically inducible micromotion. Radiographs for RSA were taken postoperatively and at three, six, 12, 18, and 24 months. At two years, there was significantly less subsidence (inferior migration) of the short femoral stem (head, 0.26 mm, 95% confidence interval (CI) 0.08 to 0.43, sd 0.38; tip, 0.11 mm, 95% CI -0.08 to 0.31, sd 0.42) compared with the conventional stem (head, 0.62 mm, 95% CI 0.34 to 0.90, sd 0.56, p = 0.02; tip, 0.43 mm, 95% CI 0.21 to 0.65, sd 0.44, p = 0.03). There was no significant difference in dynamically inducible micromotion, rate of complic...Continue Reading

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Citations

Sep 1, 2018·The Bone & Joint Journal·R J FergusonS Glyn-Jones
Sep 1, 2018·The Bone & Joint Journal·P Pairon, F S Haddad
Jul 2, 2019·The Bone & Joint Journal·V P GaleaC Bragdon
Jan 1, 2020·The Bone & Joint Journal·Fares S Haddad
May 1, 2019·The Bone & Joint Journal·F S Haddad
Feb 12, 2020·JBJS Case Connector·Christopher M MelnicHany S Bedair
Jan 9, 2021·Journal of Orthopaedic Surgery and Research·Julian HaslerMichael Finsterwald
Feb 23, 2021·Journal of Rehabilitation and Assistive Technologies Engineering·Martin Marsh, Simon Newman
Mar 25, 2021·Archives of Orthopaedic and Trauma Surgery·Anatole Vilhelm WiikJustin Peter Cobb
Nov 12, 2019·Zeitschrift für Orthopädie und Unfallchirurgie·Alexander KlugKarl Philipp Kutzner
Feb 2, 2022·Zeitschrift für Orthopädie und Unfallchirurgie·Yama AfghanyarJens Dargel

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