Effects of Reduction Osteotomy on Gap Balancing During Total Knee Arthroplasty for Severe Varus Deformity

Yasuo Niki, Kengo Harato, Katsuya Nagai, Yasunori Suda, Masaya Nakamura, Morio Matsumoto

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6 Citations (Scopus)


This study aimed to assess the effects of down-sizing and lateralizing of the tibial component (reduction osteotomy) on gap balancing in TKA, and the clinical feasibility of an uncemented modular trabecular metal tibial tray in this technique. Reduction osteotomy was performed for 39 knees of 36 patients with knee OA with a mean tibiofemoral angle of 21° varus. In 20 knees, appropriate gap balance was achieved by release of the deep medial collateral ligament alone. Flexion gap imbalance could be reduced by approximately 1.7° and 2.8° for 4-mm osteotomy and 8-mm osteotomy, respectively. Within the first postoperative year, clinically-stable tibial component subsidence was observed in 9 knees, but it was not progressive, and the clinical results were excellent at a mean follow-up of 3.3years.

Original languageEnglish
JournalJournal of Arthroplasty
Publication statusAccepted/In press - 2015 Jan 28



  • Component subsidence
  • Gap balancing
  • Reduction osteotomy
  • Total knee arthroplasty
  • Trabecular metal

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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