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Valgus medial collateral ligament rupture causes concomitant loading and damage of the anterior cruciate ligament. 2003

Augustus D Mazzocca, and Carl W Nissen, and Michael Geary, and Douglas J Adams
Dept of Orthopedic Surgery, University of Connecticut Health Center, 10 Talcott Notch Rd, MC 4037, Farmington, CT 06034-4037, USA.

This study tested the hypothesis that application of a valgus force necessary to create a complete medial collateral ligament (MCL) injury causes damage to the anterior cruciate ligament (ACL). Twelve cadaveric knees were used to measure concomitant loading and damage to the ACL in valgus knee loading sufficient to cause a grade III MCL injury. Displacement sensors were placed on the anteromedial bundle of the ACL and posterior oblique ligament to monitor tensile strain during creation of the MCL injury. A valgus moment was applied to knees flexed at 30 degrees, displacing the joint into valgus rotation beyond MCL rupture. Following valgus loading and MCL injury, femur-ACL-tibia specimens were tested to failure to compare ACL mechanical integrity to noninjured control specimens. Average ACL strength in MCL ruptured knees (1250 +/- 90 N) was statistically lower (P < or = .05) than that for control knees (2110 +/- 50 N). Strain measurements exhibited concomitant posterior oblique ligament strain during valgus loading, whereas ACL strain increased substantially only after MCL rupture. These data indicate that the ACL can be compromised in isolated grade III MCL injuries.

UI MeSH Term Description Entries
D002102 Cadaver A dead body, usually a human body. Corpse,Cadavers,Corpses
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000070598 Anterior Cruciate Ligament Injuries Sprain or tear injuries to the ANTERIOR CRUCIATE LIGAMENT of the knee. ACL Injuries,ACL Tears,Anterior Cruciate Ligament Injury,Anterior Cruciate Ligament Tear,Anterior Cruciate Ligament Tears,ACL Injury,ACL Tear,Injuries, ACL,Injury, ACL,Tear, ACL,Tears, ACL
D001696 Biomechanical Phenomena The properties, processes, and behavior of biological systems under the action of mechanical forces. Biomechanics,Kinematics,Biomechanic Phenomena,Mechanobiological Phenomena,Biomechanic,Biomechanic Phenomenas,Phenomena, Biomechanic,Phenomena, Biomechanical,Phenomena, Mechanobiological,Phenomenas, Biomechanic
D012421 Rupture Forcible or traumatic tear or break of an organ or other soft part of the body. Ruptures
D013314 Stress, Mechanical A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area. Mechanical Stress,Mechanical Stresses,Stresses, Mechanical
D013718 Tensile Strength The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001) Strength, Tensile,Strengths, Tensile,Tensile Strengths
D016022 Case-Control Studies Comparisons that start with the identification of persons with the disease or outcome of interest and a control (comparison, referent) group without the disease or outcome of interest. The relationship of an attribute is examined by comparing both groups with regard to the frequency or levels of outcome over time. Case-Base Studies,Case-Comparison Studies,Case-Referent Studies,Matched Case-Control Studies,Nested Case-Control Studies,Case Control Studies,Case-Compeer Studies,Case-Referrent Studies,Case Base Studies,Case Comparison Studies,Case Control Study,Case Referent Studies,Case Referrent Studies,Case-Comparison Study,Case-Control Studies, Matched,Case-Control Studies, Nested,Case-Control Study,Case-Control Study, Matched,Case-Control Study, Nested,Case-Referent Study,Case-Referrent Study,Matched Case Control Studies,Matched Case-Control Study,Nested Case Control Studies,Nested Case-Control Study,Studies, Case Control,Studies, Case-Base,Studies, Case-Comparison,Studies, Case-Compeer,Studies, Case-Control,Studies, Case-Referent,Studies, Case-Referrent,Studies, Matched Case-Control,Studies, Nested Case-Control,Study, Case Control,Study, Case-Comparison,Study, Case-Control,Study, Case-Referent,Study, Case-Referrent,Study, Matched Case-Control,Study, Nested Case-Control
D016118 Anterior Cruciate Ligament A strong ligament of the knee that originates from the posteromedial portion of the lateral condyle of the femur, passes anteriorly and inferiorly between the condyles, and attaches to the depression in front of the intercondylar eminence of the tibia. Cruciate Ligament, Anterior,Anterior Cranial Cruciate Ligament,Cranial Cruciate Ligament,Anterior Cruciate Ligaments,Cranial Cruciate Ligaments,Cruciate Ligament, Cranial,Cruciate Ligaments, Anterior,Cruciate Ligaments, Cranial,Ligament, Anterior Cruciate,Ligament, Cranial Cruciate,Ligaments, Anterior Cruciate,Ligaments, Cranial Cruciate
D017888 Medial Collateral Ligament, Knee The ligament that travels from the medial epicondyle of the FEMUR to the medial margin and medial surface of the TIBIA. The medial meniscus is attached to its deep surface. Collateral Ligament, Medial, Knee,Knee Medial Collateral Ligament,Ligamentum Collaterale Tibiale,Medial Ligament of Knee,Tibial Collateral Ligament,Collateral Ligament, Tibial,Collateral Ligaments, Tibial,Collaterale Tibiale, Ligamentum,Collaterale Tibiales, Ligamentum,Knee Medial Ligament,Knee Medial Ligaments,Ligament, Tibial Collateral,Ligaments, Tibial Collateral,Ligamentum Collaterale Tibiales,Tibial Collateral Ligaments,Tibiale, Ligamentum Collaterale,Tibiales, Ligamentum Collaterale

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