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Winkler PW, Wierer G, Csapo R, et al. Quantitative Evaluation of Dynamic Lateral Meniscal Extrusion After Radial Tear Repair. Orthop J Sports Med. 2020;8(4):2325967120914568doi: 10.1177/2325967120914568.
Winkler, P. W., Wierer, G., Csapo, R., Hepperger, C., Heinzle, B., Imhoff, A. B., Hoser, C., & Fink, C. (2020). Quantitative Evaluation of Dynamic Lateral Meniscal Extrusion After Radial Tear Repair. Orthopaedic journal of sports medicine, 8(4), 2325967120914568. https://doi.org/10.1177/2325967120914568
Winkler, Philipp W, et al. "Quantitative Evaluation of Dynamic Lateral Meniscal Extrusion After Radial Tear Repair." Orthopaedic journal of sports medicine vol. 8,4 (2020): 2325967120914568. doi: https://doi.org/10.1177/2325967120914568
Winkler PW, Wierer G, Csapo R, Hepperger C, Heinzle B, Imhoff AB, Hoser C, Fink C. Quantitative Evaluation of Dynamic Lateral Meniscal Extrusion After Radial Tear Repair. Orthop J Sports Med. 2020 Apr 10;8(4):2325967120914568. doi: 10.1177/2325967120914568. eCollection 2020 Apr. PMID: 32313812; PMCID: PMC7153201.
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Orthop J Sports Med. 2020 Apr 10;8(4):2325967120914568. doi: 10.1177/2325967120914568. eCollection 2020 Apr.

Quantitative Evaluation of Dynamic Lateral Meniscal Extrusion After Radial Tear Repair.

Orthopaedic journal of sports medicine

Philipp W Winkler, Guido Wierer, Robert Csapo, Caroline Hepperger, Bernhard Heinzle, Andreas B Imhoff, Christian Hoser, Christian Fink

Affiliations

  1. Sports and Joint Surgery, Gelenkpunkt, Innsbruck, Austria.
  2. Department of Orthopaedic Sports Medicine, Klinikum Rechts der Isar, Technical University of Munich, Munich, Germany.
  3. Research Unit for Orthopaedic Sports Medicine and Injury Prevention, Institute of Sports Medicine, Alpine Medicine and Health Tourism, University for Health Sciences, Medical Informatics and Technology, Hall in Tirol, Austria.
  4. Department of Orthopaedics and Traumatology, Paracelsus Medical University, Salzburg, Austria.
  5. Department of Radiology, MRT-CT Diagnostics, Wörgl, Austria.

PMID: 32313812 PMCID: PMC7153201 DOI: 10.1177/2325967120914568

Abstract

BACKGROUND: Radial tears of the lateral meniscus frequently accompany acute anterior cruciate ligament (ACL) injuries and lead to increased joint stress and pathological meniscal extrusion (ME). The dynamic behavior of the lateral meniscus after radial tear repair with respect to ME has not been described.

PURPOSE: To quantitatively assess dynamic lateral ME after all-inside radial tear repair.

STUDY DESIGN: Case series; Level of evidence, 4.

METHODS: Patients who underwent ACL reconstruction and all-inside radial tear repair of the lateral meniscus and had no history of contralateral knee injuries were included. Magnetic resonance imaging scans were acquired in loaded (50% of body weight) and unloaded conditions of both the injured and noninjured knees. A custom-made pneumatically driven knee brace was used for standardized knee positioning in 10° of flexion and with axial load application. Quantitative measures included the absolute lateral ME, meniscal body extrusion ratio, and Δ extrusion. Preoperative and postoperative unloaded extrusion data were compared by paired

RESULTS: A total of 10 patients with a mean follow-up of 47.9 months were enrolled. The intraclass correlation coefficient (ICC) confirmed good interrater reliability (ICC, 0.898) and excellent intrarater reliability (ICC, 0.976). In the unloaded injured leg, all-inside repair reduced ME from 3.15 ± 1.07 mm to 2.13 ± 0.61 mm (-32.4%;

CONCLUSION: Lateral ME depends on the knee status and loading condition. All-inside repair of radial meniscal tears led to a reduction of extrusion with no alteration in dynamic lateral ME. Meniscus-preserving therapy is recommended in the case of a radial lateral meniscal tear to preserve its dynamic behavior.

© The Author(s) 2020.

Keywords: dynamic meniscal extrusion; lateral meniscus; magnetic resonance imaging; meniscal suture repair; radial tear; stress MRI

Conflict of interest statement

One or more of the authors has declared the following potential conflict of interest or source of funding: A.B.I. has received consulting fees from Arthrosurface and Medi Bayreuth and royalties from A

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