片側下顎頭運動制限が対側顎関節に及ぼす影響に関する研究

概要

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The temporomandibular joint (TMJ) is a peculiar composite joint with bilateral joints moving at the same time. Condyler hypermobility and instability can cause disk displacement on the TMJ. I made an experimental animal model on condyler hypermobility and instability to accomplish the pathophysiological influence on absence of unilateral condylermovement. The model was produced on adult female Macaca fuscatas by limitting the glinding mobility by fixing to the zygomatic bone with a bent titanium plate on one side of the condyle. In this study, I examined the macroscopic radiological and histopathological changes on the contralateral TMJ following condyler hypermobility and instability model on the unlimited side of TMJ on adult female Macaca fuscatas. In macroscopic observation, at opening of mandible, the entire mandible directed toward the limited side after operation. In the relativity position of condyle and fossa, the condyle displaced anterior laterally as clockwise rotation at on early stage, although, the condyle was placed just under the fossa a later stage. The condyle's shape became flat at the articular surface at an early stage. At a later stage, sclerosity and atrophy, erosion remained at the condyle. The increase and invasion of microvascularity made an important contribution to the bone reconstruction.
福岡歯科大学学会の論文
1995-12-31