Lesões do ligamento cruzado posterior: características e associações mais frequentes

Caldas, Marco Túlio Lopes; Braga, Gilberto Ferreira; Mendes, Sofia Silva; Silveira, Juliano Martins da; Kopke, Robson Massi

doi:10.1016/j.rbo.2012.09.011

Cited by 8 publications

(1 citation statement)

References 22 publications

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“…However, the latest epidemiological results show that physical activity (38.8%) is the main factor of PCL injury, followed by traffic injury (35%) [4]. Any force that causes PCL stress can cause PCL injury, and its injury mechanism [5,6] is usually the excessive application of force from front to back to the tibia, which often occurs in the flexion position.…”

Section: Introductionmentioning

confidence: 99%

The effects of posterior cruciate ligament rupture on the biomechanical and histological characteristics of the medial collateral ligament: an animal study

Xie

Dong-sheng

et al. 2021

J Orthop Surg Res

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Background To investigate the effect of complete rupture of the posterior cruciate ligament (PCL) on the biomechanics and histology of the medial collateral ligament (MCL). Materials and methods Seventy-two male rabbits were randomly divided into two groups: the ruptured group was treated with complete PCL amputation, while the intact group was only subjected to PCL exposure without amputation. Eighteen rabbits were randomly sacrificed at 8, 16, 24, and 40 weeks after the operation, and their specimens were processed for mechanical tensile testing, nano-indentation experiments, hematoxylin-eosin (HE) staining, and picrosirius-polarization staining. Results There was no significant difference in the length and maximum displacement of the MCL between the ruptured group and the intact group at each time point. The maximum load of the ruptured group was significantly smaller than that of the intact group at 40 W. The elastic modulus and micro-hardness of the ruptured group increased significantly at 24 W and decreased significantly at 40 W. At 16 W and 24 W after PCL rupture, the number of type I collagen fibers and type III collagen fibers in the MCL of the ruptured group was significantly increased compared with that of the intact group. While the type I collagen fibers of the ruptured group were significantly decreased compared with the intact group at 40 W, there was no significant difference in type III collagen fibers between the ruptured group and the intact group. Conclusion PCL rupture has no significant effect on the mechanical and histological properties of MCL in a short period of time under physiological loading, but the histological and mechanical properties of MCL decrease with time.

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Section: Introductionmentioning

confidence: 99%