ラット歯根膜の微細血管構築に関する研究

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  • A Study on Periodontal Microvasculature.

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In order to more clearly define the microvasculature of the periodontal ligament of the rat, an animal frequently used as an experimental model in studies on periodontal diseases and aging. We examined the histological structure and microvasculature of the periodontal ligament of the lower first molar in 3-month-old male Wistar rats whose roots had grown fully to secure complete occlusive function.<BR>The periodontal vasculature formed a rough vasoganglion rete of thick arteriolovenules close to the alveolar bone in the apical part where the capillaries formed dense hairpin loops towards the coronal side of the root surface. This appeared as an arcade-like structure with the feet of the hairpin loops shortening as they approached the root center, becoming bundle-shaped as the loop disappeared at the alveolar crest.<BR>Thus, examination of the periodontal vessels revealed morphological differences in the respective vasculature of the apical, central and crest regions of the tooth.

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