Albert W Pearsall1, J Marcus Hollis. 1. Department of Orthopaedic Surgery, Orthopaedic Surgery Biomechanics Laboratory, University of South Alabama Medical Center, Mobile, Alabama 36617, USA. apearsal@usouthal.edu <apearsal@usouthal.edu>
Abstract
BACKGROUND: The relationship between posterior cruciate ligament insufficiency and meniscal injury is unclear. HYPOTHESIS: Posterior cruciate ligament insufficiency results in increased medial and lateral meniscal strain. STUDY DESIGN: Descriptive anatomic study. METHODS: Eight cadaveric specimens were evaluated with a 6-axis load cell and differential variable reluctance transducer strain gauges placed in both menisci. Data were recorded in the posterior cruciate ligament-intact state after posterior cruciate ligament transection and after posterior cruciate ligament reconstruction. RESULTS: The effect of posterior cruciate ligament state on meniscal strain was more pronounced at higher flexion angles. At 60 degrees and 90 degrees of flexion, there was a significant effect of posterior cruciate ligament sectioning and reconstruction on meniscal strain (P < .026). Average meniscal strain for both medial and lateral menisci increased between the intact and the posterior cruciate ligament-cut states. Posterior cruciate ligament reconstruction decreased strain values to that of the intact knee. CONCLUSIONS: Meniscal strain increases with complete posterior cruciate ligament injury and is returned to posterior cruciate ligament-intact levels after posterior cruciate ligament reconstruction. CLINICAL RELEVANCE: Posterior cruciate ligament reconstruction may play an important role in reducing meniscal strain and subsequent degeneration within the posterior cruciate ligament-injured knee.
BACKGROUND: The relationship between posterior cruciate ligament insufficiency and meniscal injury is unclear. HYPOTHESIS: Posterior cruciate ligament insufficiency results in increased medial and lateral meniscal strain. STUDY DESIGN: Descriptive anatomic study. METHODS: Eight cadaveric specimens were evaluated with a 6-axis load cell and differential variable reluctance transducer strain gauges placed in both menisci. Data were recorded in the posterior cruciate ligament-intact state after posterior cruciate ligament transection and after posterior cruciate ligament reconstruction. RESULTS: The effect of posterior cruciate ligament state on meniscal strain was more pronounced at higher flexion angles. At 60 degrees and 90 degrees of flexion, there was a significant effect of posterior cruciate ligament sectioning and reconstruction on meniscal strain (P < .026). Average meniscal strain for both medial and lateral menisci increased between the intact and the posterior cruciate ligament-cut states. Posterior cruciate ligament reconstruction decreased strain values to that of the intact knee. CONCLUSIONS: Meniscal strain increases with complete posterior cruciate ligament injury and is returned to posterior cruciate ligament-intact levels after posterior cruciate ligament reconstruction. CLINICAL RELEVANCE: Posterior cruciate ligament reconstruction may play an important role in reducing meniscal strain and subsequent degeneration within the posterior cruciate ligament-injured knee.
Authors: Marcin Kowalczuk; Marie-Claude Leblanc; Benjamin B Rothrauff; Richard E Debski; Volker Musahl; Nicole Simunovic; Olufemi R Ayeni Journal: Knee Surg Sports Traumatol Arthrosc Date: 2015-04-03 Impact factor: 4.342
Authors: Thomas L Sanders; Ayoosh Pareek; Ian J Barrett; Hilal Maradit Kremers; Andrew J Bryan; Michael J Stuart; Bruce A Levy; Aaron J Krych Journal: Knee Surg Sports Traumatol Arthrosc Date: 2016-02-27 Impact factor: 4.342