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Article Abstract
Background: The purposes of this study were to evaluate whether the planning method using the contralateral limb status is reasonable and to determine the disparity between the preoperative planning and actual postoperative correction status by analyzing lateral cortical hinge fractures (LCHFs) in patients who underwent distal femoral osteotomy (DFO).
Methods: From 2014 to 2018, 31 cases undergoing DFO were evaluated. The patients were divided into two groups according to two preoperative planning methods. The disparity between the preoperative planning and the postoperative weight-bearing line (WBL) ratio and clinical scores were compared. Analysis was performed to determine the causes of the disparity by evaluating the osteotomy configuration, including that of LCHFs.
Results: The disparity was observed in the WBL ratio assessment (P < 0.01). In the comparison between two groups, no statistically significant differences were found in the change of WBL ratio (P = 0.78) and postoperative clinical scores. The length of the osteotomy gap was only related to the disparity (R = 0.22, P = 0.01), while no statistical significance was found for the regression equation of the displaced LCHF (P > 0.05). The length of the remaining bone between the osteotomy end and opposite cortex was significantly associated with the presence of LCHF (odds ratio, 3.904).
Conclusions: The planning method using a contralateral limb status showed similar results to the classical method, but the two methods produced disparity when the degree of correction was increased. LCHF was mostly related to the remaining bone in the medial closing-wedge DFO.
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| http://dx.doi.org/10.1016/j.knee.2020.08.020 | DOI Listing |
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