Survivorship of Extensor Mechanism Allograft Reconstruction After Total Knee Arthroplasty. Academic Article uri icon

Overview

abstract

  • BACKGROUND: Extensor mechanism disruption remains a devastating complication after total knee arthroplasty. The purpose of this study is to describe the outcomes of extensor mechanism allograft (EMA) reconstruction in a large single-center case series. METHODS: Consecutive patients with a previous total knee arthroplasty undergoing extensor mechanism reconstruction using a fresh-frozen EMA tensioned in full extension were identified retrospectively from single-center institutional database (N = 25 patients, 26 knees; mean follow-up 68 months [range 22-113 months]). The primary outcome was initial allograft failure, defined as removal of the allograft or extensor lag >30 degrees at most recent follow-up. RESULTS: Sixty-nine percent (18/26) of knees had retained their initial allograft reconstruction at their latest follow-up despite reoperation rates of 58% (15/26). A younger age was significantly associated with failure of the initial allograft reconstruction. Knee Society Scores increased from 101 (38 standard deviation [SD]) to 116 (40 SD) at most recent follow-up for the group as a whole (P = .4). Patients undergoing a reoperation for any cause had lower Knee Society Scores (101 [SD 38] vs 138 [SD 32], respectively; P = .04) at most recent follow-up. CONCLUSION: EMA reconstruction shows adequate overall intermediate-term survival; however, reoperation rates were high and associated with worse functional outcomes.

publication date

  • June 29, 2016

Research

keywords

  • Allografts
  • Arthroplasty, Replacement, Knee
  • Knee Joint
  • Postoperative Complications
  • Reoperation

Identity

Scopus Document Identifier

  • 84998886390

Digital Object Identifier (DOI)

  • 10.1016/j.arth.2016.06.031

PubMed ID

  • 27480825

Additional Document Info

volume

  • 32

issue

  • 1