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. 1983 Mar;136(Pt 2):425–439.

Ultrastructural changes in articular cartilage after experimental section of the anterior cruciate ligament of the dog knee.

R A Stockwell, M E Billingham, H Muir
PMCID: PMC1170988  PMID: 6853355

Abstract

Ultrastructural changes in articular cartilage were studied in joint laxity induced by severing the anterior cruciate ligament of the right knee in sixteen mature dogs. The left knees provided controls; sham operations on six other dogs consisted of stab incision only, leaving the ligament intact. Cartilage from the medial tibial condyles was examined at intervals from two days to eighteen months later. In the superficial zone of the cartilage, collagen fibrils became abnormally widely spaced at four days, and narrower fibrils appeared from seven days after operation. Chondrocytes, particularly in the middle zone, became more active, with hypertrophy of cytoplasmic organelles detectable from four days. Superficial cells were initially healthy and became more numerous while their lipid content increased. The articular surface was fissured from two months and cell degeneration was rarely seen until several months after operation. These findings correlate with previous biochemical studies and are similar to early changes noted in degeneration of human articular cartilage.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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