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Pag Teixeira - One of the best experts on this subject based on the ideXlab platform.
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Imaging appearance and prevalence of the anteromedial Meniscofemoral Ligament: A potential pitfall to anterior cruciate Ligament analysis on MRI
European journal of radiology, 2019Co-Authors: J.m. Trinh, J. De Verbizier, S. Lecocq Texeira, Romain Gillet, W. Arab Abou, Alain Blum, Pag TeixeiraAbstract:Abstract Purpose To describe the aspect of the anteromedial Meniscofemoral Ligament on MRI and to assess its prevalence. Method One thousand five hundred sixty knee MRI studies were retrospectively evaluated for the presence of an anteromedial Meniscofemoral Ligament. In addition to these studies, nine full MRI studies from our department’s image archive were also analysed. The anteromedial Meniscofemoral Ligament length, thickness, and angle with respect to the tibial plateau were evaluated independently by two radiologists. For comparison purposes, the anterior cruciate Ligament was assessed in the same manner. Results There was a 0.77% prevalence of the anteromedial Meniscofemoral Ligament in the study population. Compared to the anterior cruciate Ligament, the anteromedial Meniscofemoral Ligament was 80.6%–83.8% thinner according to both observers (P = 0.0002), with a mean thickness of 1.53 ± 0.47 mm and 1.80 ± 0.66 mm determined by observers 1 and 2, respectively. The anteromedial Meniscofemoral Ligament angles were 15%–17.7% lower than the anterior cruciate Ligament angles (P Conclusions The anteromedial Meniscofemoral Ligament is a rare structure that can be differentiated from the anterior cruciate Ligament based on morphologic criteria.
Rainer Burgkart - One of the best experts on this subject based on the ideXlab platform.
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repair of the lateral posterior meniscal root improves stability in an acl deficient knee
Knee Surgery Sports Traumatology Arthroscopy, 2018Co-Authors: Philipp Forkel, Wolf Petersen, Constantin Von Deimling, Lucca Lacheta, Florian B Imhoff, Peter Foehr, Lukas Willinger, Felix Dyrna, Andreas B Imhoff, Rainer BurgkartAbstract:To investigate the stabilizing effect of a lateral meniscus posterior root repair in an ACL and root deficient knee. 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. 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. 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.
Philipp Forkel - One of the best experts on this subject based on the ideXlab platform.
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repair of the lateral posterior meniscal root improves stability in an acl deficient knee
Knee Surgery Sports Traumatology Arthroscopy, 2018Co-Authors: Philipp Forkel, Wolf Petersen, Constantin Von Deimling, Lucca Lacheta, Florian B Imhoff, Peter Foehr, Lukas Willinger, Felix Dyrna, Andreas B Imhoff, Rainer BurgkartAbstract:To investigate the stabilizing effect of a lateral meniscus posterior root repair in an ACL and root deficient knee. 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. 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. 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.
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the biomechanical effect of a lateral meniscus posterior root tear with and without damage to the Meniscofemoral Ligament efficacy of different repair techniques
Arthroscopy, 2014Co-Authors: Philipp Forkel, Mirco Herbort, Frederike Sprenker, Sebastian Metzlaff, Michael J Raschke, Wolf PetersenAbstract:Purpose: To evaluate the effect of the Meniscofemoral Ligament (MFL) in maintaining lateral-compartment contact pressures after injury to the posterior root of the lateral meniscus, and to measure the ability to restore intra-articular loads to normal by repairing the posterior root to the tibia after transection of the posterior root and the MFL. Methods: Ten human cadaveric knee joints were axially loaded to 100 N. A digital pressure sensor measured the contact pressure in the lateral compartment. Five different conditions were tested: intact, after release of the posterior root of the lateral meniscus, after transection of the MFL along with release of the posterior root, refixation of the posterior root of the lateral meniscus to the tibia using an anatomic transosseous tunnel, and refixation of the root of the lateral meniscus using a tibial anterior cruciate Ligament (ACL) tunnel. Results: After transection of the posterior lateral meniscus root, the contact pressure did not increase significantly. The additional transection of the MFL led to a significant increase in the contact pressure. Anatomic fixation of the meniscus posterior horn reduced the femorotibial pressure to nearly pre-sectioning values. The reattachment of the meniscus posterior horn through a tibial ACL tunnel was equivalent to an anatomic fixation. Conclusions: In the case of a root tear of the lateral meniscus, the MFL maintains meniscus function and stabilizes the pressure in the lateral compartment. A complete detachment of the posterior meniscus horn (MFL and root tear) leads to an increase in the intra-articular pressure. A root repair normalizes the pressure down to normal values. The tibial ACL tunnel is suitable to perform the repair and to lead out the suture. Clinical Relevance: In the case of a complete detachment of the meniscus posterior horn, fixation of the posterior root is necessary to restore the meniscus function and to guarantee an equal pressure distribution in the lateral compartment. It can be combined with an ACL reconstruction.
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biomechanical consequences of a posterior root tear of the lateral meniscus stabilizing effect of the Meniscofemoral Ligament
Archives of Orthopaedic and Trauma Surgery, 2013Co-Authors: Philipp Forkel, Mirco Herbort, Martin Schulze, Dieter Rosenbaum, Lars Kirstein, Michael J Raschke, Wolf PetersenAbstract:Purpose The purpose of this study was to evaluate the effects of different types of lateral meniscus root tears in terms of tibiofemoral contact stress.
King Hei Stanley Lam - One of the best experts on this subject based on the ideXlab platform.
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letter to the editor comments on ultrasound imaging of the posterior cruciate Ligament and its mimic the posterior Meniscofemoral Ligament
Pain Practice, 2021Co-Authors: King Hei Stanley Lam, Chenyu Hung, Pingtang LiuAbstract:We read with interest the recently published article titled, "Ultrasound Imaging of the Posterior Cruciate Ligament and its Mimic, the Posterior Meniscofemoral Ligament" by Ke-Vin Chang et al.1 We appreciate the authors for raising the attention on the posterior Meniscofemoral Ligament (PMFL) which is an important but frequently neglected structure for the stability of the posterior knee and the lateral meniscus. Herein, we would like to share our opinions regarding the sonoanatomy of this Ligament, which would replenish this clinically important article.
J.m. Trinh - One of the best experts on this subject based on the ideXlab platform.
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Imaging appearance and prevalence of the anteromedial Meniscofemoral Ligament: A potential pitfall to anterior cruciate Ligament analysis on MRI
European journal of radiology, 2019Co-Authors: J.m. Trinh, J. De Verbizier, S. Lecocq Texeira, Romain Gillet, W. Arab Abou, Alain Blum, Pag TeixeiraAbstract:Abstract Purpose To describe the aspect of the anteromedial Meniscofemoral Ligament on MRI and to assess its prevalence. Method One thousand five hundred sixty knee MRI studies were retrospectively evaluated for the presence of an anteromedial Meniscofemoral Ligament. In addition to these studies, nine full MRI studies from our department’s image archive were also analysed. The anteromedial Meniscofemoral Ligament length, thickness, and angle with respect to the tibial plateau were evaluated independently by two radiologists. For comparison purposes, the anterior cruciate Ligament was assessed in the same manner. Results There was a 0.77% prevalence of the anteromedial Meniscofemoral Ligament in the study population. Compared to the anterior cruciate Ligament, the anteromedial Meniscofemoral Ligament was 80.6%–83.8% thinner according to both observers (P = 0.0002), with a mean thickness of 1.53 ± 0.47 mm and 1.80 ± 0.66 mm determined by observers 1 and 2, respectively. The anteromedial Meniscofemoral Ligament angles were 15%–17.7% lower than the anterior cruciate Ligament angles (P Conclusions The anteromedial Meniscofemoral Ligament is a rare structure that can be differentiated from the anterior cruciate Ligament based on morphologic criteria.