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<p>Conventional manual unicompartmental knee arthroplasty (CM-UKA) is technically demanding, and surgeon handedness may affect component alignment. Whether Mako robot-assisted UKA (MA-UKA) can mitigate this handedness effect remains unclear. A total of 391 patients undergoing medial UKA performed by five right‑handed surgeons were enrolled in this retrospective analysis. These individuals were allocated to four study arms. Perioperative outcomes, radiographic parameters and functional scores were compared. MA groups had longer operative time but similar tourniquet time, shorter hospital stay, and less blood loss than CM groups (all P&lt;0.05). MA-left and MA-right showed no differences in any radiographic or functional parameters (P&gt;0.05). In contrast, CM-left performed significantly worse than CM-right in terms of implant positioning accuracy (P&lt;0.05). Functional outcomes were better in MA groups, with no side‑related differences. In CM‑UKA, the surgeon’s hand dominance markedly influences component alignment precision, with inferior outcomes consistently appearing on the non‑dominant side. MA-UKA mitigates this handedness bias, achieving equally high accuracy on both sides, while also reducing blood loss, shortening hospital stay, and improving early functional recovery.</p>

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Mako robot-assisted unicompartmental knee arthroplasty mitigates the impact of surgeon handedness

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Shujun Chen,
  • Xiao Huang,
  • Lingjun Jiang,
  • Zhongyi Chen,
  • Jiayan Chen,
  • Chenglong Wang

摘要

Conventional manual unicompartmental knee arthroplasty (CM-UKA) is technically demanding, and surgeon handedness may affect component alignment. Whether Mako robot-assisted UKA (MA-UKA) can mitigate this handedness effect remains unclear. A total of 391 patients undergoing medial UKA performed by five right‑handed surgeons were enrolled in this retrospective analysis. These individuals were allocated to four study arms. Perioperative outcomes, radiographic parameters and functional scores were compared. MA groups had longer operative time but similar tourniquet time, shorter hospital stay, and less blood loss than CM groups (all P<0.05). MA-left and MA-right showed no differences in any radiographic or functional parameters (P>0.05). In contrast, CM-left performed significantly worse than CM-right in terms of implant positioning accuracy (P<0.05). Functional outcomes were better in MA groups, with no side‑related differences. In CM‑UKA, the surgeon’s hand dominance markedly influences component alignment precision, with inferior outcomes consistently appearing on the non‑dominant side. MA-UKA mitigates this handedness bias, achieving equally high accuracy on both sides, while also reducing blood loss, shortening hospital stay, and improving early functional recovery.