Microvasculature of the Mandibular Periosteum in Japanese Monkeys
2001 Volume 43 Issue 3 Pages 227-239
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2001 Volume 43 Issue 3 Pages 227-239
We studied the microvasculature of the mandibular periosteum in Japanese monkeys, to determine the morphological features of the vascular network and its relation ship to histological properties of surrounding tissue. Microvascular casts were prepared using acrylic resin injection and examined by scanning electron microscopy (SEM), then serial histological specimens were prepared and observed by light microscopy.
We did not find a deep layer of the periosteum vascular network, where vessels and cells are generally abundant, in the gingival area. A double structure composed of a deep vascular network layer consisting of a dense capillary network and a superficial layer consisting of a coarse and irregular vascular network formed in the alveolar mucous area. In the deep layer, the vascular network of the periosteum notably varied in morphology between the gingival area and alveolar mucous area on the alveolar bone surface. Histological features of the mucous membrane strongly reflected the vascular network of the periosteum. The deep layer of the alveolar mucous area varied in vascular morphology and distribution, corresponding to the convexo-concave bone. In the body of the mandible, the mesh structure of the deep layer was more coarse than that of the alveolar mucous area, where we found emissary veins passing through the large perforating lumen. Observation from the bone side clearly confirmed the margin of the gingival-alveolar mucosa and the margin between the alveolar area and body of the mandible, based on differences in the vasculature of the periosteum network.
Our findings showed that the vascular network of the mandible periosteum differed for the gingival and alveolar mucous areas and the body of the mandible, reflecting the histological features of surrounding tissue. In the gingival area specifically, tissue homeostasis was maintained by close cooperation between the alveolar bone and periodontal membrane. J. Jpn. Soc. Periodontol., 43: 227-239, 2001.
