Postoperative clinical outcomes of unicompartmental knee arthroplasty in patients with isolated medial compartmental osteoarthritis following medial meniscus posterior root tear

Takaaki Hiranaka, Takayuki Furumatsu, Yuki Okazaki, Takaaki Tanaka, Masatsugu Ozawa, Kenji Masuda, Noritaka Seno, Haowei Xue, Toshifumi Ozaki

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Cartilage degradation progresses rapidly following medial meniscus posterior root tear (MMPRT). Unicompartmental knee arthroplasty (UKA) has been performed for medial compartmental osteoarthritis following MMPRT. We evaluated the clinical and radiographic outcomes of UKA for medial compartmental osteoarthritis after an untreated MMPRT. Methods: Twenty-one patients who underwent UKA for isolated medial compartment osteoarthritis following MMPRT were retrospectively investigated. Clinical outcomes were assessed using the Knee Injury and Osteoarthritis Outcome Score and knee range of motion. The posterior tibial slope and tibial component inclination were evaluated using plain radiographs. Results: The mean follow-up periods were 25.5 ± 13.8 months. Clinical outcomes improved significantly postoperatively. The mean postoperative knee extension angle was −1.1° ± 2.1°, and the knee flexion angle was 134.3° ± 4.9°. The posterior tibial slope angle decreased from 9.0° ± 2.0° preoperatively to 5.4° ± 1.8° postoperatively, and postoperative tibial component inclination at the final follow-up was 2.9° ± 1.1° varus. No aseptic loosening or deep infections were observed. Conclusion: UKA significantly improved clinical outcomes and could be a viable surgical option for treating isolated medial compartmental osteoarthritis accompanied by untreated MMPRT.

Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalAsia-Pacific Journal of Sports Medicine, Arthroscopy, Rehabilitation and Technology
Volume26
DOIs
Publication statusPublished - Oct 2021

Keywords

  • Arthritis
  • Clinical outcome
  • Medial meniscus
  • Meniscal repair
  • Posterior root tear
  • Unicompartmental knee arthroplasty

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

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