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1 Department of Anatomy, School of Medicine, University of Southern California, Los Angeles, California
The growth and transformation of the mandibular joint of the normal rat has been studied. Rats in 15 different age groups, ranging from 1 day to 2 years old, were examined.
Changes due to normal aging have been described in the principal regions of the joint, namely the joint fossa, the articular disc, and the mandibular condyle.
Distinct changes were observed in the bone of the joint fossa and of the condyle. More subtle changes occurred in the articular disc. Most remarkable was the constancy of thickness of the condylar cartilage after the 50th day of life.
Submitted on November 27, 1964
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