アブストラクト（20巻2号：The Bulletin of Kanagawa Dental College）

The Bulletin of Kanagawa Dental College

English

Title　： Single Cilia in the Junctional Epithelial Cells of the Rat Molar Teeth
Subtitle　： ORIGINAL ARTICLES
Authors　： Kazuyoshi Higashi, Tetsuyoshi Itoh, Kumi Akimoto, Show Sasa, Hajime Fushimi*, Toshiro Kodama*, Toshio Hori*
Authors（kana）　：
Organization　： Departments of Oral Histology, Kanagawa Dental College, *Departments of Periodontology, Kanagawa Dental College
Journal　： The Bulletin of Kanagawa Dental College
Volume　： 20
Number　： 2
Page　： 114-121
Year/Month　： 1992 / 9
Article　： Original article
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] An electron microscopic observation was performed to investigate the structure of a single cilium in the junctional epithelium on the buccal and lingual sides of the mandibular molar teeth of rats. The single cilia were found in the junctional epithelial cells of all layers. There were no single cilia, however, penetrating the basal lamina to reach the lamina propria of the gingiva or the enamel. But the single cilia of gingival epithelial cells disappear in the cells of the middle layer before reaching the free surface of the epithelium. The above difference may be due to the characteristic feature of the junctional epithelial cells which have no free surface and are located in contact with a basal lamina on both sides. The single cilia had a basal structure of the two-centriole type, and the microtubules near the most proximal portion of the cilium exhibited a 9+0 pattern, which was represented by nine sets of peripheral doublet microtubules with the absence of a central microtubule. This structure was identical with the structure of the single cilia reported in other organs and tissues. Based on the above findings, the single cilia may have sensory or chemoreceptive functions, as reported in the cells of other organs and tissues. It is also likely that the single cilia have a supplementary function in the junctional epithelium which regulates the transit of substances from the gingival sulcus to the lamina propria of the gingiva.
Practice　： Dentistry
Keywords　： Single Cilium, Junctional Epithelial Cell, Molar Tooth, Rat