Nobuto T, Tanda H, Yanagihara K, Nishikawa Y, Imai H, Yamaoka A
J Periodontal Res. 1989 Jan;24(1):45-52. doi: 10.1111/j.1600-0765.1989.tb00856.x.
The morphological consistency of subepithelial connective tissue and its vascular architecture was studied in the healthy gingiva of adult mongrel dogs. Corrosion-cast specimens of the vasculature and specimens of well-separated connective tissue from the lamina propria were observed by SEM. Specimens injected with india ink also were examined employing light microscopy. Summarizing the results: 1) Beneath the buccal gingival epithelium, short conical papillae were seen in the subepithelial connective tissue. The capillary structure throughout this region was basically of the loop type, the overall appearance of which replicated the papillae. The papilla disappeared at the muco-gingival junction, so that after the transition to the alveolar mucosa, no papillary formation was observed. The vasculature had transformed from loop to network structure. 2) Beneath the sulcular gingival epithelium, the subepithelial connective tissue displayed a smooth concavity with no papillae. In this region, the capillaries formed a flat, dense network in accordance with the morphology of the connective tissue. The capillary network suddenly disappeared at the terminal edge of the inner epithelium. The vessels of the lamina propria located immediately beneath the network reduced their lumina at the margin and formed the plexus of the periodontium, displaying a rather open network.
在成年杂种犬的健康牙龈中，研究了上皮下结缔组织的形态一致性及其血管结构。通过扫描电子显微镜观察了血管的腐蚀铸型标本以及从固有层分离良好的结缔组织标本。还采用光学显微镜检查了注射印度墨水的标本。总结结果如下：1）在颊侧牙龈上皮下方，上皮下结缔组织中可见短锥形乳头。该区域的毛细血管结构基本为袢型，其整体外观与乳头相似。乳头在龈黏膜交界处消失，因此在过渡到牙槽黏膜后，未观察到乳头形成。血管结构已从袢型转变为网状结构。2）在龈沟上皮下方，上皮下结缔组织呈现光滑的凹陷，无乳头。在该区域，毛细血管根据结缔组织的形态形成扁平、致密的网络。毛细血管网络在内侧上皮的末端边缘突然消失。紧邻网络下方的固有层血管在边缘处管腔变窄，形成牙周丛，呈现出相当开放的网络。
