Planned bone resections using an MRI-based custom cutting guide system versus 3-dimensional, weight-bearing images in total knee arthroplasty

Denis Nam, Brandon Williams, Jeffrey Hirsh, Staci R. Johnson, Ryan M. Nunley, Robert L. Barrack

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Potential sources of alignment variability not yet investigated with the use of custom cutting guides (CCG) in total knee arthroplasty (TKA) are weight-bearing and lower extremity rotation. This study compared the preoperative planned bone resections created using an MRI-based CCG system to those from 3-dimensional, weight-bearing, full-length lower extremity images in 53 patients undergoing TKA. The angular difference between the proposed resections of the two systems was greater than 2° in 30.2% of patients for the distal femur, and 52.8% for the proximal tibia. An increased preoperative varus alignment had a slight association with an increased angular difference for the tibial resection (r = 0.4). This study demonstrates weight-bearing and lower extremity rotation to be potential sources of alignment variability when using MRI-based CCGs.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalJournal of Arthroplasty
Volume30
Issue number4
DOIs
StatePublished - Apr 1 2015

Keywords

  • Alignment
  • Custom cutting guides
  • Rotation
  • Total knee arthroplasty
  • Weight-bearing

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