Restoring femoral offset is the most important technical factor in preventing total hip arthroplasty dislocation

Braxton Forde; Kathleen Engeln; Hany Bedair; Nicholas Bene; Carl Talmo; Sumon Nandi

doi:10.1016/j.jor.2018.01.026

Restoring femoral offset is the most important technical factor in preventing total hip arthroplasty dislocation

J Orthop. 2018 Jan 31;15(1):131-133. doi: 10.1016/j.jor.2018.01.026. eCollection 2018 Mar.

Authors

Braxton Forde¹, Kathleen Engeln², Hany Bedair³, Nicholas Bene⁴, Carl Talmo⁵, Sumon Nandi⁶

Affiliations

¹ The Johns Hopkins University School of Medicine, Baltimore, MD, United States.
² Baylor College of Medicine, Houston, TX, United States.
³ Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
⁴ Tufts University School of Medicine, Boston, MA, United States.
⁵ New England Baptist Hospital, Boston, MA, United States.
⁶ The University of Toledo College of Medicine and Life Sciences, Toledo, OH, United States.

Abstract

Purpose: Our aim was to determine if acetabular component position, femoral offset restoration, or leg-length equality is most important for total hip arthroplasty (THA) stability.

Methods: A matched case (n = 67)-control (n = 247) design and conditional logistic regression model were used to examine risk factors for dislocation in primary THA.

Results: When femoral offset was at least 3 mm greater than that of the contralateral hip, risk of dislocation was lower (p = 0.0192). Neither leg-length difference nor acetabular component abduction or version angle was associated with dislocation.

Conclusions: Our data suggest restoring femoral offset is the most important technical factor in preventing THA dislocation.

Keywords: Component position; Dislocation; Femoral offset; Total hip arthroplasty.