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- W3204121135 abstract "Soft tissue laxity around the knee joint has been recognized as a crucial factor affecting correction error during medial open-wedge proximal tibial osteotomy (MOWPTO). Medial laxity in particular, which represents the changes in joint-line convergence angle (JLCA), affects soft tissue correction.The purpose of this study was to quantify medial laxity and develop a preoperative planning method that considers medial laxity.Cohort study; Level of evidence, 3.This study retrospectively reviewed 139 knees in 117 patients who underwent navigation-assisted MOWPTO from January 2014 to July 2019 for symptomatic medial compartment osteoarthritis with varus alignment >5°. We compared the results of 2 preoperative planning methods: conventional Miniaci (n = 47) and latent medial laxity reduction (LMLR) (n = 92). We evaluated the incidence of undercorrection, acceptable correction, and overcorrection. The radiologic parameters were analyzed using multiple linear regression with a stepwise selection model to establish an equation for the optimal preoperative planning method. The intraclass correlation coefficients (ICCs) of intraobserver, interobserver, and intermethod reliability were calculated.The Miniaci method showed a higher incidence of overcorrection (55.3%) than the LMLR method (22.8%) at postoperative 6 months (P = .0006). Multiple linear regression with a stepwise selection model revealed a high correlation coefficient (R2 = 0.888) for the following equation: Adjusted planned correction angle = 0.596 + 0.891 × Target correction angle - 0.255 × ΔJLCAvalgus . Upon simplification, the following equation showed the highest intermethod ICC value (0.991): Target correction angle - ⅓ΔJLCAvalgus , while the Miniaci method showed a relatively low ICC value of 0.875.There was a risk of overcorrection after MOWPTO using the conventional Miniaci method. An equation that considers medial laxity may help during preoperative planning for optimal correction during MOWPTO." @default.
- W3204121135 created "2021-10-11" @default.
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- W3204121135 date "2021-10-01" @default.
- W3204121135 modified "2023-09-30" @default.
- W3204121135 title "Reliability of Preoperative Planning Method That Considers Latent Medial Joint Laxity in Medial Open-Wedge Proximal Tibial Osteotomy" @default.
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- W3204121135 doi "https://doi.org/10.1177/23259671211034151" @default.
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