Analysis of the correlation between the changes of femoral positioning point and graft diameter and the rotational stability of knee joint in anterior cruciate ligament reconstruction
LIU Yang YIN Tian BI Fang-shan HOU Yun-jie NIU Kai CHEN Wen-xue▲ ZHAO Xing-wei WANG Xin-xin
Department of Spine and Joint，Beijing Fengsheng Bone Injury Hospital，Beijing 100033，China
Abstract：Objective To investigate the correlation between the changes of femoral positioning point and graft diameter and the rotational stability of knee joint in anterior cruciate ligament reconstruction. Methods From January 2014 to March 2019，60 patients with anterior cruciate ligament injury in our hospital were selected as the study objects，anterior cruciate ligament reconstruction was performed，and CT examination was performed after operation. The following two experiments were carried out respectively. In experiment 1，ensuring the same graft diameter，the correlation between different tunnel positioning points and knee rotation stability was analyzed. In experiment 2，ensuring the femoral side positioning point was consistent，each group was divided into according to different control tunnel diameters，grouping was corried out，30 cases in each groups. When the control tunnel diameter was 7 mm，they were divided into group a (n=18) and group A (n=12) according to different distances. When the control tunnel diameter was 8 mm，they were divided into group b (n=13) and group B (n=17) according to different distances. In experiment 2，the control tunnel diameter of 7 mm were selected as group c (n=30). The control tunnel diameter of 8 mm were selected as group d(n=30). The correlation between the different tunnel diameter and the rotation stability of knee joint was analyzed. In the two groups of experiments，the change of the distance of trochlear groove (TT-TG value) was observed，and the TTTG value of patients was observed，and the correlation between the two groups of experiments and the rotation stability of knee joint was analyzed. Results In experiment 1，the TT-TG value in group a was significantly lower than that in group A when the tunnel diameter was controlled to be 7 mm，the difference was statistically significant (P＜0.05). In group b，the TT-TG value was significantly lower than that in group B when the tunnel diameter was controlled to be 8 mm，the difference was statistically significant (P＜0.05). Correlation analysis showed that the positioning point was positively correlated with the rotational stability of the knee joint (P＜0.05). In experiment 2，there was no significant difference in the TT-TG value between group c and group d when the positioning point range was constant (P＞0.05). Correlation analysis showed that there was no correlation between the change of graft diameter and the rotation stability of knee joint (r=0.3617，P=0.0716). Conclusion There is no correlation between the change of the graft diameter and the rotational stability of the knee joint in anterior cruciate ligament reconstruction，but there is a positive correlation between the femoral positioning point and the rotational stability of the knee joint. Therefore，it is necessary to pay more attention to the femoral positioning point to make it accurate.
刘洋; 尹天; 毕方杉; 侯云杰; 牛凯; 陈文学; 赵兴玮; 王鑫欣. 前交叉韧带重建术股骨侧定位点及移植物直径变化与膝关节旋转稳定性相关性分析[J]. 中国当代医药, 2020, 27(18): 94-96.
LIU Yang; YIN Tian; BI Fang-shan; HOU Yun-jie; NIU Kai; CHEN Wen-xue; ZHAO Xing-wei; WANG Xin-xin. Analysis of the correlation between the changes of femoral positioning point and graft diameter and the rotational stability of knee joint in anterior cruciate ligament reconstruction. 中国当代医药, 2020, 27(18): 94-96.
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