Morphology of the articular cartilage of the knee joint in rats with extraarticular femoral bone deformity

Authors

DOI:

https://doi.org/10.15674/0030-59872017163-71

Keywords:

posttraumatic deformation of the femur, knee joint, rats, osteoarthrosis, histological changes

Abstract

Objective: to assess the structural and functional state of the rat knee after modeling posttraumatic extraarticular deformation of the femur.

Methods: experiment was performed in 39 white mature (6 months old) male rats. To model the deformation of varus (test group, 15 rats) after transverse osteotomy of the fe­mur, a bent angled rod was introduced into the medullary ca­nal, the control animal (15) was straight. The comparison group was intact rats (9) of the corresponding age and sex. After 1, 3 and 6 months. After the operation, histological examination was performed.

Results: In 1 month after modeling the deformation in the articular cartilage of the knee joint, destructive changes of 1–2 degree according to OARSI were noted. In contralateral extremity, AC had a structure characteristic of the age norm. After 3 months a decrease in the width of articular cartilage (in comparison with intact group by 1.21 times, p < 0.01), loss of glycosaminoglycans, a violation of the structure and ordering of collagen fibers, accumulation of type I collagen was estab­lished. After 6 months the most pronounced disorders were found in the cerebral cortex on the medial condyle of the deformed femur — a 1.63 fold decrease in its width compared with the in­tact group (p < 0.001), in places the replacement with fibrous cartilage.

Conclusions: in animals with simulated extraarticular deformation of the femur in the knee joint of the injured limb after 1 month revealed destructive changes that progressed with time. After 1 month the maximum manifestation of disorders was noted in the area of the femur surface under the patella, and after 3 and 6 months he medial condyle. In the articular cartilage of the knee joint of the contralateral limb, destruc­tive changes were recorded 3 months after the reproduction of the deformation, but the severity of the manifestations was less.

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How to Cite

Romanenko, K., Ashukina, N., Batura, I., & Prozorovsky, D. (2017). Morphology of the articular cartilage of the knee joint in rats with extraarticular femoral bone deformity. ORTHOPAEDICS TRAUMATOLOGY and PROSTHETICS, (1), 63–71. https://doi.org/10.15674/0030-59872017163-71

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No. 1 (2017)

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ORIGINAL ARTICLES

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Copyright (c) 2017 Konstantin Romanenko, Nataliya Ashukina, Inna Batura, Dmytro Prozorovsky

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