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<p>Unicompartmental knee arthroplasty (UKA) preserves both cruciate ligaments, enabling nearly physiological joint kinematics, faster rehabilitation and improved return to sports compared to total knee arthroplasty (TKA). Consequently, there is increasing interest in treating symptomatic bicompartmental (BiCom) osteoarthritis by combining two partial knee replacements. This article discusses the various types of combined partial prostheses. According to the current evidence BiCom procedures yield good clinical outcomes, although without a&#xa0;clearly demonstrated advantage over TKA; however, patients with primary patellofemoral osteoarthritis and concomitant tibiofemoral joint degeneration appear to particularly benefit. In cases of progressive osteoarthritis following a&#xa0;previous UKA, the staged addition of a&#xa0;second partial prosthesis offers advantages over conversion to TKA. Although the short-term revision risk of BiCom is slightly elevated, robotic assistance has been shown to mitigate this. The long-term implant survival is also acceptable, with approximately 80% survivorship at 15&#xa0;years.</p>

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Kombinationen von Teilprothesen am Kniegelenk

  • 期刊论文

  • 发表日期：

    2025年8月11日

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  • Tilman Calliess,
  • Grégoire Thürig,
  • Carlo Theus-Steinmann

摘要

Unicompartmental knee arthroplasty (UKA) preserves both cruciate ligaments, enabling nearly physiological joint kinematics, faster rehabilitation and improved return to sports compared to total knee arthroplasty (TKA). Consequently, there is increasing interest in treating symptomatic bicompartmental (BiCom) osteoarthritis by combining two partial knee replacements. This article discusses the various types of combined partial prostheses. According to the current evidence BiCom procedures yield good clinical outcomes, although without a clearly demonstrated advantage over TKA; however, patients with primary patellofemoral osteoarthritis and concomitant tibiofemoral joint degeneration appear to particularly benefit. In cases of progressive osteoarthritis following a previous UKA, the staged addition of a second partial prosthesis offers advantages over conversion to TKA. Although the short-term revision risk of BiCom is slightly elevated, robotic assistance has been shown to mitigate this. The long-term implant survival is also acceptable, with approximately 80% survivorship at 15 years.