Aging changes of the tooth movement mechanism - Study from the three-dimensional microstructuer within the alveolar bone -

本研究的目的是阐明年轻人和老年人牙齿移动过程中牙周结构的影响。作为第一步，目的是检查拔除对侧牙齿后牙髓微血管的变化，以确定功能减退的情况。我们的结果表明，咬合刺激影响牙冠区域牙髓的微血管和细胞密度。第二步，研究正畸力作用于大鼠磨牙时，年龄对根间骨冠反应的影响。在牙齿移动过程中，与青年大鼠相比，老年大鼠神经根间骨嵴的骨吸收程度较低。与青年大鼠相比，老年大鼠在高血糖状态下不受高血糖状态的影响。

The purpose of this study is clarified the influence of periodontal structure during tooth movement in young and aged. As a first step, the purpose was to examine the changes in the pulpal microvasculature following removal the opposing teeth for establishing hypofunctional condition. Our results suggest that occlusal stimulation affects the microvasculature and cellular density of dental pulp in the coronal area of teeth. As a second step, the purpose was to examine the influence of aging on the reaction of interradicular bone crest when the orthodontic force was applied to rat molar. During tooth movement, compared with young rat, the bone resorption in interradicular bone crest of aged rat is low. And aged rats were not affected by hyperglycemia condition compared with young rats under the hyperglycemia.