Abstract
Purpose
There is a lack of studies investigating the distal tibial rotation (DTR) during medial opening wedge high tibial osteotomy (MOWHTO). This study was designed to evaluate osseous factors influencing DTR in patients who underwent biplane MOWHTO.
Methods
A total of 106 knee joints in 69 patients who underwent surgery for varus malalignment of knee were reviewed. Based on several software, standard and actual hinge positions were defined in pre-operative and post-operative CT data. Pearson’s correlation and Spearman’s correlation analysis were performed with DTR change as the dependent variable. Independent variables included angles between standard and actual hinge in the sagittal (ASAHS) and axial (ASAHA) planes, pre-operative and post-operative medial proximal tibial angle, opening width (OW), tuberosity osteotomy angle, flange angle (FA), gap ratio, and hinge fracture.
Results
The distal tibia rotated approximately 0.35° internally. Pearson’s and Spearman’s correlation analysis showed that DTR change was associated with ASAHS, OW, and FA. Larger OW and FA resulted in higher external rotation angles.
Conclusions
DTR change was significantly associated with ASAHS, followed by OW and FA rather than ASAHA if only considering osseous factors in biplane MOWHTO. The distal tibia tended to rotate externally when the actual hinge was inclined posteriorly to the standard hinge in the sagittal planes, but rotate externally or internally when the actual hinge was inclined anteriorly.
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Data availability
The data are available from the corresponding author on reasonable request.
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Funding
This work was supported by grants from China Research and Promotion of Traditional Chinese Medicine (2021-18) and grants from the Traditional Chinese Medicine Technology of Shandong Province (2021M173).
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LZJ contributed to the literature search, data analysis, and manuscript preparation. WGW contributed to data collection. LY contributed to statistics analysis and manuscript editing. XZ contributed to the data collection and analysis. JSY contributed to the conceptualization and manuscript review. JW contributed to the substantial conceptualization, supervision, and final approval of the draft version. All authors read and approved the final manuscript.
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This study was approved by the Board of Research Ethics of our hospital (2021-059-KY).
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**g, L., Zhao, X., Wang, W. et al. Osseous factors influencing distal tibial rotation in biplane medial opening wedge high tibial osteotomy. International Orthopaedics (SICOT) 48, 465–471 (2024). https://doi.org/10.1007/s00264-023-05968-7
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DOI: https://doi.org/10.1007/s00264-023-05968-7