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- Title
Repair of the lateral posterior meniscal root improves stability in an ACL-deficient knee.
- Authors
Forkel, Philipp; von Deimling, Constantin; Lacheta, Lucca; Imhoff, Florian B.; Foehr, Peter; Willinger, Lukas; Dyrna, Felix; Petersen, Wolf; Imhoff, Andreas B.; Burgkart, Rainer
- Abstract
<bold>Purpose: </bold>To investigate the stabilizing effect of a lateral meniscus posterior root repair in an ACL and root deficient knee.<bold>Methods: </bold>The hypothesis of the current study was that a sequential transection of the posterior root and the meniscofemoral ligaments in an ACL-deficient knee increases rotational instability, and conversely, a repair of the meniscus root reduces the internal tibial rotation. Therefore, eight human knee joints were tested in a robotic setup (5 N m internal torque, 50 N m anterior translation load). Five conditions were tested: intact, ACL cut, ACL cut + lateral meniscus posterior root tear (LMRT), ACL cut + LMRT + transection of the MFL and ACL cut + lateral meniscus root repair. The angles of internal tibial rotation as well as anterior tibial translation were recorded.<bold>Results: </bold>Transection of the lateral meniscus posterior root increased the internal tibial instability as compared to the ACL-insufficient state. A significant increase was detected in 60° and 90° of flextion. Sectioning of the meniscofemoral ligament further destabilized the knees significantly at all flexion angles as compared to the ACL-deficient state. Even in 30°, 60° and 90° a significant difference was detected as compared to the isolated root tear. A tibial fixation of the lateral meniscus root reduced the internal tibial rotation in all flexion angles and led to a significant decrease of internal tibial rotation in 30° and 90° as compared to the transection of the root and the MFL. The anterior tibial translation was increased in all conditions as compared to the native state.<bold>Conclusion: </bold>A lateral meniscus root repair can reduce internal tibial rotation in the ACL-deficient knee. To check the condition of the lateral posterior meniscus root attachment is clinical relevant as a lateral meniscus root repair might improve rotational stability.
- Subjects
MENISCUS surgery; ANTERIOR cruciate ligament surgery; KNEE anatomy; LIGAMENTS; TIBIA physiology; MEDICAL cadavers; ANATOMY; KNEE surgery; TIBIA surgery; ARTICULAR ligament surgery; COMPARATIVE studies; DEAD; JOINT hypermobility; RANGE of motion of joints; KINEMATICS; KNEE injuries; RESEARCH methodology; MEDICAL cooperation; RESEARCH; RESEARCH funding; ROBOTICS; ROTATIONAL motion; ANTERIOR cruciate ligament injuries; TORQUE; EVALUATION research
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2018, Vol 26, Issue 8, p2302
- ISSN
0942-2056
- Publication type
journal article
- DOI
10.1007/s00167-018-4949-8