Effect of body mass index on limb alignment after total knee arthroplasty

Chris S. Estes, Kenneth J. Schmidt, Ryan McLemore, Mark J. Spangehl, Henry D. Clarke

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


Prior studies have reported increased failure rates in obese patients with postoperative limb mal-alignment. This study was undertaken to determine if a relationship exists between postoperative limb alignment and BMI in patients undergoing primary TKA performed with mechanical instruments. An IRB-approved retrospective review of 196 knees was undertaken. Limb alignment was determined on full-length, standing, hip-to-ankle x-rays, preoperatively and postoperatively. The effects of gender, side, preoperative mechanical alignment and BMI on postoperative alignment were analyzed via multivariate regression analysis. Both preoperative mechanical limb alignment ( p < 0.001) and BMI ( P= 0.009) had a significant effect on postoperative limb alignment following TKA performed with mechanical instruments.

Original languageEnglish (US)
Pages (from-to)101-105
Number of pages5
JournalJournal of Arthroplasty
Issue number8 SUPPL
StatePublished - Sep 2013


  • Body mass index
  • Complications
  • Mal-alignment
  • Obesity
  • Total knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine


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