Steep posterior slope and shallow concave shape of the medial tibial plateau are risk factors for medial meniscus posterior root tears

Yuki Okazaki, Takayuki Furumatsu, Yuya Kodama, Yusuke Kamatsuki, Yoshiki Okazaki, Takaaki Hiranaka, Shota Takihira, Tomonori Tetsunaga, Kenta Saiga, Toshifumi Ozaki

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Purpose: Bone morphological factors are important for menisci. Their association with medial meniscus posterior root tears, however, has not yet been studied. This study aimed to compare sagittal medial tibial slope and medial tibial plateau depth between knees with and without medial meniscus posterior root tears. Methods: Nine healthy volunteers, 24 patients who underwent anterior cruciate ligament reconstruction, and 36 patients who underwent medial meniscus posterior root pullout repair were included. Magnetic resonance imaging examinations were performed in the 10°-knee-flexed position. The medial tibial slope and medial tibial plateau depth were compared among the groups. Results: In healthy volunteers, the anterior cruciate ligament reconstruction group, and the medial meniscus posterior root tear group, the medial tibial slopes were 3.5° ± 1.4°, 4.0° ± 1.9°, and 7.2° ± 1.9°, respectively, and the medial tibial plateau depths were 2.1 ± 0.7 mm, 2.2 ± 0.6 mm, and 1.2 ± 0.5 mm, respectively. Patients with medial meniscus posterior root tears had a significantly steep medial tibial slope and shallow medial tibial plateau concavity compared to those of healthy volunteers (P < 0.01) and the anterior cruciate ligament group (P < 0.01). In the multivariate logistic regression analysis, body mass index, medial tibial slope, and medial tibial plateau depth were significantly associated with medial meniscus posterior root tears. Conclusions: A steep posterior slope and a shallow concave shape of the medial tibial plateau are risk factors for medial meniscus posterior root tear. Level of evidence: Level III: Case–control study.

Original languageEnglish
JournalKnee Surgery, Sports Traumatology, Arthroscopy
DOIs
Publication statusPublished - Jan 1 2019

Keywords

  • Magnetic resonance imaging
  • Medial meniscus
  • Medial tibial plateau depth
  • Medial tibial slope
  • Posterior root tear

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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