Medial meniscus posterior root repair restores the intra-articular volume of the medial meniscus by decreasing posterome
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Medial meniscus posterior root repair restores the intra‑articular volume of the medial meniscus by decreasing posteromedial extrusion at knee flexion Yoshiki Okazaki1 · Takayuki Furumatsu1 · Takatsugu Yamauchi2 · Yuki Okazaki1 · Yusuke Kamatsuki3 · Takaaki Hiranaka1 · Yuya Kajiki1 · Ximing Zhang1 · Toshifumi Ozaki1 Received: 21 August 2019 / Accepted: 23 March 2020 © European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA) 2020
Abstract Purpose Transtibial repair of a medial meniscus posterior root tear (MMPRT) can improve clinical outcomes, although meniscal extrusion remains. However, few studies have investigated the volume of meniscal extrusion. This study aimed to evaluate the effect of transtibial repair in reducing the volume using three-dimensional (3D) magnetic resonance imaging, at 10° and 90° knee flexion. Methods Twenty patients with MMPRTs and 16 volunteers with normal knees participated. The 3D models of meniscus were constructed using SYNAPSE V INCENT®. The meniscal extrusion and its volume were measured at 10° and 90° knee flexion. Differences between the pre- and postoperative examinations were assessed using the Wilcoxon signed-rank test. The postoperative parameters were compared to those in patients with normal knees. Results There were no significant pre- and postoperative differences in any parameter at 10° knee flexion. At 90° knee flexion, the posterior extrusion and its meniscal volume were decreased significantly after transtibial repair (p
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