Abstract
This study investigated the effects of aging on the articular cartilage of the mandible. Wistar rats were divided in two groups (n = 10/per group): 3-months-old group (young group); and 13-months-old group (aged group). After euthanasia, the head of the mandible was collected and stained with hematoxylin and eosin (HE) to evaluate the thickness of the articular layer and cartilage. Sections stained with Picrosirius red and Safranin O were used to evaluate the collagen and proteoglycans deposition, respectively. First, aging has decreased the articular layer thickness. Second, the results suggest a decrease of chondrocytes followed by an increase of the matrix to maintain the mandible homeostasis. Finally, both collagen and proteoglycans increased with aging. Aging displayed important effects to the mandible of aged rats.
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