| Background and Objective: According to the previous studies, it would seem that a conservative estimate of the percentage of people in the general population with some type of TMD is between 40% and 60%. Young adults comprise the largest population of individuals presenting with TMJ problems. It is clear that remodeling changes are common in young adult TMJs. It is difficult to make the distinction, histologically, between what can be regarded as a normally aged joint and one that has become pathologically involved, because all the adaptive mechanisms characteristic of remodeling are active in the osteoarthritic joint.Several tissues are involved in temporomandibular joint (TMJ): the mandibular fossa of the temporal bone, the TMJ disc, and the condyle (including articular cartilage and subchondral bone). The subchondral bone plate supports the articular cartilage in diarthrodial joints. It has a significant mechanical function of transmitting loads from the cartilage into the underlying cancellous bone and has been implicated in remodeling of the joint and its sparing in the destruction of cartilage in osteoarthritis (OA). However, little is known about its composition, structure or its function during the remodeling of condyle. The aims of this study were to make a model by anterior-superior displacement of the mandible in the rat...
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