Two pegs are better than one: rare mode of femoral component failure in unicompartmental arthroplasty requiring revision to total knee arthroplasty

Ryan Stancil; Nathan Summers; Douglas Van Citters; Adam Sassoon

doi:10.1016/j.artd.2017.10.004

Two pegs are better than one: rare mode of femoral component failure in unicompartmental arthroplasty requiring revision to total knee arthroplasty

Arthroplast Today. 2017 Nov 22;4(2):153-157. doi: 10.1016/j.artd.2017.10.004. eCollection 2018 Jun.

Authors

Ryan Stancil¹, Nathan Summers¹, Douglas Van Citters², Adam Sassoon¹

Affiliations

¹ Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, USA.
² Dartmouth Biomedical Engineering Center, Hanover, NH, USA.

Abstract

Femoral component fracture is a rare complication in unicompartmental knee arthroplasty, especially in cemented prostheses. We present a 75-year-old man who presented with a fractured single-peg Vanguard component 9 years postoperatively. He was revised to a total knee arthroplasty with an excellent functional outcome at 1 year. The components were additionally examined at an outside biomechanical engineering laboratory. Theories as to the cause of the component fracture include aseptic loosening due to a thin anterior cement mantle and the single-peg Oxford design.

Keywords: Complication; Femoral component fracture; Revision total knee arthroplasty; Unicompartmental knee arthroplasty.

Publication types

Case Reports