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Differences in preoperative planning for high-tibial osteotomy between the standing and supine positions

Knee Surgery & Related Research 2021년 33권 1호 p.8 ~ 8
Matsushita Takehiko, Watanabe Shuji, Araki Daisuke, Nagai Kanto, Hoshino Yuichi, Kanzaki Noriyuki, Matsumoto Tomoyuki, Niikura Takahiro, Kuroda Ryosuke,
소속 상세정보
 ( Matsushita Takehiko ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Watanabe Shuji ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Araki Daisuke ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Nagai Kanto ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Hoshino Yuichi ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Kanzaki Noriyuki ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Matsumoto Tomoyuki ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Niikura Takahiro ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery
 ( Kuroda Ryosuke ) - Kobe University Graduate School of Medicine Department of Orthopaedic Surgery

Abstract


Introduction: Previous studies have reported that alignment changes depend on the patient’s position in orthopedic surgery. However, it has not yet been well examined how the patient’s position affects the preoperative planning in high-tibial osteotomy (HTO). Therefore, the aim of this study was to investigate the effects of the patient’s position on preoperative planning in HTO.

Materials and methods: A total of 60 knees in 55 patients who underwent HTO were retrospectively examined. Virtual preoperative planning for medial open-wedge HTO (OWHTO), lateral closed-wedge HTO (CWHTO), and hybrid CWHTO were performed by setting the percentage of the weight-bearing line (%WBL) at 62% as an optimal alignment. The correction angle differences between the supine and standing radiographs were measured. The virtual %WBL (v%WBL) was determined by applying the correction angle obtained from the standing radiograph to the supine radiograph. The %WBL discrepancy (%WBLd) was calculated as v%WBL???62 (%) to predict the possible correction errors during surgeries. A single regression analysis was performed to examine the correlation between the correction angle difference and %WBLd.

Results: The mean correction angle was significantly higher when the preoperative planning was based on standing radiographs than when based on supine radiographs (P?
Conclusions: We found significant differences in the estimated correction angles between the supine and standing radiographs in the planning for HTO. Therefore, surgeons should carefully consider the difference between supine and standing radiographs and estimate the possible correction error during surgery when planning a HTO.

키워드

High-tibial osteotomy; Preoperative planning; Standing; Supine

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