Effect of the match between the medial femoral condyle and tibial plateau on the tear of the posterior root of the medial meniscus evaluated by MRI

doi:10.12307/2022.510

Abstract

Abstract: BACKGROUND: The anatomical parameters of the femoral condyle and tibial plateau affect the biomechanics of the knee joint. The matching of the medial femoral condyle and the medial tibial plateau may affect the magnitude of the annular stress on the medial meniscus, and thus affect the posterior root tear of medial meniscus.
OBJECTIVE: To evaluate the effect of the match between the medial femoral condyle and the tibial plateau on the tear of the posterior root of the medial meniscus.
METHODS: The data of patients who underwent knee MRI examination at the 904 Hospital of the Joint Service Support Force of Chinese PLA due to knee joint pain from January 2016 to January 2020 were retrospectively analyzed. Finally, 52 patients with medial meniscus posterior root tear were selected as observation group; 40 patients without abnormal bone and soft tissue anatomy were selected as control group. The anatomical parameters of the knee joint were measured on MRI: medial femoral condyle anteroposterior diameter, medial tibial plateau anteroposterior diameter, medial femoral condyle transverse diameter, and the transverse diameter of the medial tibial plateau. The lateral diameter ratio of the medial femoral condyle to the medial tibial plateau and the anteroposterior diameter ratio of the medial femoral condyle to the medial tibial plateau were calculated. At the same time, receiver operating characteristic curve analysis was performed to determine the critical value of risk factors for posterior root tear of the medial meniscus.
RESULTS AND CONCLUSION: (1) The medial femoral condyle transverse diameter and medial femoral condyle anteroposterior diameter were greater in the observation group than those in the control group (P < 0.05). The lateral diameter ratio of the medial femoral condyle to the medial tibial plateau and the anteroposterior diameter ratio of the medial femoral condyle to the medial tibial plateau were greater in the observation group than those in the control group (P < 0.05). There were no significant differences in the transverse diameter of the medial tibial plateau and medial tibial plateau anteroposterior diameter between the two groups (P > 0.05). (2) Receiver operating characteristic curves demonstrated that the best cut-off value of the transverse diameter ratio of the medial femoral condyle to the medial tibial plateau was 0.85, the sensitivity was 57.69%, and the specificity was 97.50%; area under the curve was 0.815. The best cut-off value of the anteroposterior diameter ratio of the medial femoral condyle to the medial tibial plateau was 1.29, and the sensitivity was 61.54%; the specificity was 95.00%; area under the curve was 0.710. (3) These findings suggest that the lateral diameter ratio of the medial femoral condyle to the medial tibial plateau greater than 0.85 and the anteroposterior diameter ratio of the medial femoral condyle to the medial tibial plateau greater than 1.29 may be an important risk factor for the occurrence of posterior root tear of the medial meniscus. The method of measuring the lateral diameter ratio and the anteroposterior diameter ratio of the medial condyle to the plateau in coronal and sagittal MRI views of knee joint has a high sensitivity and detection rate for the diagnosis of posterior root tears of the medial meniscus.

Key words: knee joint, posterior root of meniscus tear, matching, MRI, transverse diameter of medial femoral condyle, transverse diameter of medial tibial plateau, anteroposterior diameter of medial femoral condyle, anteroposterior diameter of medial tibial plateau

CLC Number:

Tu Youwei, Liu Yunpeng, Wang Xingliang, Peng Chao, Yang Jiaji . Effect of the match between the medial femoral condyle and tibial plateau on the tear of the posterior root of the medial meniscus evaluated by MRI[J]. Chinese Journal of Tissue Engineering Research, 2022, 26(12): 1872-1876.

Figures/Tables 4

References

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