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Title of Journal: Arch Orthop Trauma Surg

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Abbravation: Archives of Orthopaedic and Trauma Surgery

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Springer-Verlag

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DOI

10.1002/pol.1979.130171108

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1434-3916

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Biomechanical consequences of a posterior root tea

Authors: Philipp Forkel Mirco Herbort Martin Schulze Dieter Rosenbaum Lars Kirstein Michael Raschke Wolf Petersen
Publish Date: 2013/03/31
Volume: 133, Issue: 5, Pages: 621-626
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Abstract

Ten porcine knees each underwent five different testing conditions with the menisci intact a simulated lateral posterior root tear with and without cutting the meniscofemoral ligament and with an artificial tear of the posterior root of the medial meniscus Biomechanical testing was performed at 30° of flexion with an axial load of 100 N A pressure sensor st Sensor Type S2042 Novel Munich was used to measure the tibiofemoral contact area and the tibiofemoral contact pressure Data were analyzed to assess the differences in contact area and tibiofemoral peak contact pressure among the five meniscal conditionsThere was no significant difference in mean contact pressure between the state with the menisci intact and an isolated posterior root tear of the lateral meniscus In case of a root tear and a tear of the meniscofemoral ligament the contact area decreased in comparison with the intact state of the menisci After additional cutting of the meniscofemoral ligament the tibiofemoral contact pressure was significantly higher in comparison with the intact state and the avulsion injury In the medial compartment joint compression forces were significantly increased in comparison with the intact state after cutting the posterior root of the medial meniscus P  005The consequence of a medial meniscus root tear is well known and was verified by this analysis The results of the present study show that the biomechanical consequences of a lateral meniscus root tear depend on the state of the meniscofemoral ligament An increase in tibiofemoral contact pressure is only to be expected in combined injuries of the meniscus root and the meniscofemoral ligaments

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