J Korean Orthop Assoc.  2023 Feb;58(1):35-44. 10.4055/jkoa.2023.58.1.35 .

Analysis of the Effect of the Size of the Medial Femoral Condyle and Medial Tibial Condyle on the Tear of Medial Meniscus Posterior Horn Root

• Park SS
• Sohn SE
• Kang SY
• Choi JY

• KMID: 2539499
• DOI: http://doi.org/10.4055/jkoa.2023.58.1.35

Abstract

Purpose
Many studies have been conducted on the cause of the medial meniscus posterior horn root (MMPHR) tears. A previous study reported that the relatively large size of the medial femoral condyle (MFC) compared to the size of the medial tibial condyle (MTC) could cause a tear of the MMPHR. The authors conducted a study to confirm that this was correct.
Materials and Methods
Patients who underwent magnetic resonance imaging of the knee at our Hospital from March 2011 to April 2019 were divided into a group with a tear of MMPHR and a control group without a tear. The size (MFC, MTC) and relative size ratio of the MFC and the MTC (MFC/MTC) were measured and compared to determine if there was any correlation with the tear of MMPHR.
Results
The mean MFC size of the 175 patients with MMPHR tear was 24.6±2.1 mm (0°), 23.5±2.1 mm (30°), 24.1±2.2 mm (60°), and the mean MTC size was 28.2±2.2 mm. The mean size of the MFC of the 147 control subjects was 25.2±2.4 mm (0°), 23.9±2.3 mm (30°), and 24.5±2.6 mm (60°), and the mean size of the MTC was 29.0±2.6 mm. The mean ratios (MFC/MTC) of the 175 patients with MMPHR tears were 0.87±0.05 (0°), 0.83±0.04 (30°), and 0.85±0.05 (60°) for each location. The corresponding mean ratios (MFC/MTC) of the 147 control subjects were 0.87±0.05 (0°), 0.83±0.04 (30°), and 0.85±0.05 (60°). There was no significant difference between the patient group and the control group.
Conclusion
The size and relative ratio of MFC and MTC do not appear to be related to a tear of the MMPHR.

Keyword

medial meniscus; root tear; medial femoral condyle; medial tibial condyle