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| Content Provider | Springer Nature : BioMed Central |
|---|---|
| Author | Xie, Wen-qing He, Miao He, Yu-qiong Yu, Deng-jie Jin, Hong-fu Yu, Fang Li, Yu-sheng |
| Abstract | 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. |
| Related Links | https://josr-online.biomedcentral.com/counter/pdf/10.1186/s13018-021-02443-0.pdf |
| Ending Page | 9 |
| Page Count | 9 |
| Starting Page | 1 |
| File Format | HTM / HTML |
| DOI | 10.1186/s13018-021-02443-0 |
| Journal | Journal of Orthopaedic Surgery and Research |
| Issue Number | 1 |
| Volume Number | 16 |
| Language | English |
| Publisher | BioMed Central |
| Publisher Date | 2021-05-21 |
| Access Restriction | Open |
| Subject Keyword | Orthopedics Surgical Orthopedics PCL rupture MCL Collagen fiber Elastic modulus Micro-hardness |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surgery Orthopedics and Sports Medicine |
| Journal Impact Factor | 2.8/2023 |
| 5-Year Journal Impact Factor | 3/2023 |
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