Is tibiofemoral subluxation correctable in unicompartmental knee arthroplasty?

Denis Nam, Saker Khamaisy, Brian P. Gladnick, Sophia Paul, Andrew D. Pearle

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The purposes of this study were to describe a method for measuring tibiofemoral subluxation in UKA, and to report the mean amount of tibiofemoral subluxation seen both preoperatively and postoperatively in a cohort of patients undergoing UKA. Two hundred thirty-five patients who received a medial UKA, and 39 patients who received a lateral UKA, were reviewed. In the medial UKA cohort, the mechanical alignment was corrected from 7.7°±5.9° preoperatively, to 2.9°±2.5° postoperatively, while the tibiofemoral subluxation was corrected from 4.5. mm. ±. 3.0. mm preoperatively, to 2.3. mm. ±. 2.7. mm postoperatively. In the lateral UKA cohort, the mechanical alignment was corrected from -. 5.5°±3.8° to -. 1.6°±3.4°, while the tibiofemoral subluxation was corrected from 4.3. mm. ±. 2.7. mm to 2.8. mm. ±. 2.5. mm. This study presents a novel method for measurement of tibiofemoral subluxation, the mean amount of tibiofemoral subluxation present preoperatively, and the amount of correction that can be expected during both medial and lateral unicondylar knee arthroplasty.

Original languageEnglish
Pages (from-to)1575-1579
Number of pages5
JournalJournal of Arthroplasty
Volume28
Issue number9
DOIs
StatePublished - Oct 2013
Externally publishedYes

Keywords

  • Correction
  • Mechanical alignment
  • Subluxation measurement
  • Tibiofemoral subluxation
  • Unicompartmental knee arthroplasty

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