측두하악관절 골관절증에 의한 하악골 형태변화의 기전 -증례 및 동물실험을 통해서 살펴본 하악골 변형- The mechanism of the morphologic changes of mandible induced by the osteoarthrosis of temporomandibular joint (TMJ) -Mandibular deformities in the patient cases and animal experiment-
pp.283-295
Osteoarthrosis in TMJ is known to accompany characteristic features of the craniofacial malformation and malocclusion. In order to explain the mechanism that brings about the typical mandibular changes relating to the frequent clinical symptom, i.e., the limited mouth opening in TMJ patients. The present study investigated the mandibular morphology of the rabbit, also intentional TMJ osteoarthrosis was performed on the TMJ of the rabbits and their morphological changes were observed. A total of 12 New Zealand house rabbits weighing an average of 3 kgwere used and all left side joints were surgically meniscectomized and right side joints were used as controls. The rabbits were sacrificed in one week, two weeks, one month, three months and 5 months after the menisectomy, and the removed TMJs were examined by histological and radiographical methods and analyzed statistically. It was found that the mandibular morphology caused by osteoarthritis in the TMJ was characterized by the decrease in size of the ascending ramus, posterior ramus bowing, deep antegonial notch and thickening of the cortex in inferior and posterior borders of the mandible, that the similar features were also observed in the rabbit mandible. When the menisectomy was performed in the unilateral side of rabbit TMJ, the mandibular changes including the increased depth of antegonial notch and posterior ramus bowing occurred only on the affected side. These data suggested that the limitation of the mandibular movement and altered masticatory pattern by meniscectomy affects the structural remodeling of the mandible and TMJ likely the TMJ osteoarthrosis
ll. 재료 및 방법
III. 결 과
lV. 고 찰
V. 결 론
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