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Knee Surgery, Sports Traumatology, Arthroscopy
Published in: Knee Surgery, Sports Traumatology, Arthroscopy 1/2021

01-01-2021 | Magnetic Resonance Imaging | KNEE

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

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

Published in: Knee Surgery, Sports Traumatology, Arthroscopy | Issue 1/2021

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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.
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Metadata
Title
Steep posterior slope and shallow concave shape of the medial tibial plateau are risk factors for medial meniscus posterior root tears
Authors
Yuki Okazaki
Takayuki Furumatsu
Yuya Kodama
Yusuke Kamatsuki
Yoshiki Okazaki
Takaaki Hiranaka
Shota Takihira
Tomonori Tetsunaga
Kenta Saiga
Toshifumi Ozaki
Publication date
01-01-2021
Publisher
Springer Berlin Heidelberg
Published in
Knee Surgery, Sports Traumatology, Arthroscopy / Issue 1/2021
Print ISSN: 0942-2056
Electronic ISSN: 1433-7347
DOI
https://doi.org/10.1007/s00167-019-05590-4

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