胫骨结节远端高位截骨术中MPTA与WBLR的相关性分析

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Abstract

Objective To explore the correlation between medial proximal tibia angle (MPTA) and weightbearing line ratio (WBLR) in the distal tibial tuberosity high tibial osteotomy (DTT-HTO).Methods A total of 26 patients (28 knees) who received DTT-HTO treatment in Minimal Invasive Joint Surgery Department of the Third Affiliated Hospital of Beijing University of Chinese Medicine from October 2019 to October 2021 were selected，including 4 males and 22 females，9 left knees and 19 right knees.The age distribution ranged from 50 to 81 years old with an average age of (65.68±6.53)years old.All patients underwent surgery and were followed up.MPTA and WBLR were used to evaluate the changes of lower limb mechanical status before and after surgery.The changes in MPTA and WBLR before and after surgery were calculated.Knee function before and after surgery was evaluated by the hospital special surgery (HSS)，and the changes in HSS before and after surgery were calculated.In this study，WBLR was set at a good position of 50% ~ 70%，and SPSS 25.0 software was used for data analysis.Receiver operating characteristic (ROC) curve was plotted to obtain the area under the curve (AUC)，and MPTA critical values corresponding to 50% and 70% WBLR were calculated，respectively.Patients were divided into under-corrected group，appropriate corrected group and over-corrected group according to two critical values.Preoperative baseline information，preoperative and postoperative WBLR，MPTA，HSS，and changes before and after surgery were compared among the three groups.SPSS 25.0 software was used to draw the correlation analysis scatter plots of WBLR and MPTA before and after surgery.Results Postoperative WBLR，MPTA and HSS were significantly different from those before surgery，and the differences were statistically significant (P＜0.01).MPTA was correlated with WBLR regardless of preoperative，postoperative or change value.AUC were all greater than 0.5.The critical values of MPTA for 50% WBLR and 70% WBLR are 90.5 ° and 93.5 °，respectively，and the critical values for MPTA changes for 50% WBLR and 70% WBLR were 6.5 ° and 9.5 °，respectively.There was no significant difference in preoperative baseline information among the three groups.Preoperative MPTA，postoperative MPTA changes，postoperative MPTA，postoperative WBLR，postoperative HSS and postoperative WBLR changes showed statistically significant differences among the three groups，and pairwise comparison was conducted based on the positive results.Conclusion MPTA has certain diagnostic value for KOA.As a simple and time saving single joint measurement method，MPTA is recommended to be applied to the knee joint intraoperative image of C arm and as a reference value for HTO measurement except the lower limb force line，so as to achieve accurate and convenient intraoperative measurement requirements.

Key words： distal tibial tuberosity high tibial osteotomy correlation analysis weight-bearing line ratio medial proximal tibia angle

Corresponding Authors: Tian Xiangdong

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	Ding Tiansong
	Tian Xiangdong
	Tan Yetong
	Xue Zhipeng
	Ma Sheng
	Hu Yuanyi
	Li Xiaomin
	Yin Yuetong

Cite this article:

Ding Tiansong,Tian Xiangdong,Tan Yetong, et al. Dependence Analysis Between MPTA and WBLR in the Distal Tibial Tuberosity High Tibial Osteotomy[J]. sygkzz, 2023, 29(5): 405-.

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http://www.sygkzz.com/EN/ OR http://www.sygkzz.com/EN/Y2023/V29/I5/405

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