La réparation en «pull out» transtibial des lésions de la racine postérieure du ménisque médial restaure la rotation physiologique du ménisque médial sur un genou fléchi - 28/01/19
Transtibial pullout repair of medial meniscus posterior root tear restores physiological rotation of the tibia in the knee-flexed position
Abstract |
Background |
Medial meniscus posterior root tear (MMPRT) results in joint overloading and degenerative changes in the knee. Favorable clinical outcomes have been reported after transtibial pullout repair of MMPRT. To date, however, in vivo tibial rotational changes before and after root repair remain poorly understood. The purpose of this study was to investigate postoperative changes in tibial rotation following MMPRT pullout repair.
Hypothesis |
Pathological external rotation in the knee-flexed position is caused by MMPRT and is reduced after transtibial pullout repair.
Patients and methods |
Fifteen patients who underwent MMPRT pullout repair and 7 healthy volunteers were included. Magnetic resonance imaging examinations were performed in the 10° and 90° knee-flexed positions. The angles between the surgical epicondylar axis and a line between the medial border of the patellar tendon and the apex of the medial tibial spine were measured. Baseline was defined as a line lying at a right angle to the other, and a value was positive and negative when the tibia rotated internally and externally, respectively.
Results |
In the volunteer's normal knees, tibial internal rotation was +1.00°±3.27° at 10° flexion and +4.14°±3.46° at 90° flexion. In the MMPRT preoperative knees, tibial internal rotation was +1.07°±3.01° at 10° flexion and +1.27°±2.96° at 90° flexion. In the postoperative knees, tibial internal rotation was +1.60°±2.85° at 10° flexion and +4.33°±2.89° at 90° flexion.
Discussion |
This study demonstrates discontinuity of the MM posterior root may induce a pathological external rotation of the tibia during knee flexion and that MMPRT pullout repair reduces the pathological external rotation of the tibia in the knee-flexed position.
Level of evidence |
III, comparative retrospective study.
Le texte complet de cet article est disponible en PDF.Keywords : Medial meniscus, Posterior root tear, Magnetic resonance imaging, Tibial rotation, Transtibial pullout repair
☆ | Cet article peut être consulté in extenso dans la version anglaise de la revue Orthopaedics & Traumatology : Surgery & Research sur Science Direct (sciencedirect.com) en utilisant le DOI ci-dessus. |
Vol 105 - N° 1
P. 59 - février 2019 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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