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

Matsushita Takehiko; Watanabe Shu; Araki Daisuke; Nagai Kanto; Hoshino Yuichi; Kanzaki Noriyuki; Matsumoto Tomoyuki; Niikura Takahiro; Kuroda Ryosuke

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자료유형: 학술저널

저자정보: Matsushita Takehiko (Kobe University Graduate School of Medicine) Watanabe Shu (Kobe University Graduate School of Medicine) Araki Daisuke (Kobe University Graduate School of Medicine) Nagai Kanto (Kobe University Graduate School of Medicine) Hoshino Yuichi (Kobe University Graduate School of Medicine) Kanzaki Noriyuki (Kobe University Graduate School of Medicine) Matsumoto Tomoyuki (Kobe University Graduate School of Medicine) Niikura Takahiro (Kobe University Graduate School of Medicine) Kuroda Ryosuke (Kobe University Graduate School of Medicine)

저널정보: 대한슬관절학회 Knee Surgery and Related Research Knee Surgery and Related Research 제33권

발행연도: 2021.1

수록면: 8 - 8 (1page)

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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.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. The mean correction angle was significantly higher when the preoperative planning was based on standing radiographs than when based on supine radiographs ( P <?0.001), and the mean difference was 2.2?±?1.5°. The difference between the two conditions in the medial opening gaps for OWHTO, lateral wedge sizes (mm) for CWHTO, and hybrid CWHTO were 2.6?±?2.0, 2.3?±?1.6, and 1.9?±?1.4, respectively. The mean v%WBL was 71.2%?±?7.3%, and the mean %WBLd was 10.1%?±?7.4%. A single regression analysis revealed a linear correlation between the correction angle difference and %WBLd (%WBLd?=?4.72?×?correction angle difference?+?0.08). No statistically significant difference in the parameters was found between the supine and standing radiographs postoperatively. 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.

#High-tibial osteotomy #Preoperative planning #Standing #Supine

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