Kinebuchi T
Department of Oral Anatomy, Faculty of Dentistry, Tokyo Medical and Dental University.
Kokubyo Gakkai Zasshi. 1990 Dec;57(4):464-519. doi: 10.5357/koubyou.57.464.
The mucous epithelium of the rat palatal rugae was observed by light and electron microscopy. The shape of the epithelial-connective tissue junction (ECJ) of the rat palatal mucosa was found to be composed of ridge-type papillae (RTP) which ran in an antero-posterior direction (APD). The purpose of the study is to investigate the differentiation of the basal and spinous layer in the palatal mucosa which consists of RTP by the observation of the shape of the ECJ and the morphology and structure of the constituent cells.
(1) The RTP which ran in the APD appeared to be related to the direction of the blood vessels and collagen bundles within the submucous and papillary layers. (2) The basal cells were classified into B1, B2 and B3 cells for the sake of convenience from the morphological and structural characteristics. Polyhedral spinous cells located within the lower third of the spinous layer were also classified into S1P and S11 cells. (3) The B1 and S11 cells were mainly distributed in the inter-papillary area (1-area), the B2 and S1P cells in the papillary area (P-area) and the B3 cells between the P- and I-area (PI-area). (4) The cell division was observed chiefly in the I- or PI-area in the APD and the divided cells appeared to become B1 cells. The B1 cells transitionally changed into B2 or B3 cells and finally into S1P cells in the P-area, and S1I cells in the I-area.
通过光学显微镜和电子显微镜观察大鼠腭皱襞的黏液上皮。发现大鼠腭黏膜上皮-结缔组织交界（ECJ）的形态由沿前后方向（APD）排列的嵴型乳头（RTP）组成。本研究的目的是通过观察ECJ的形态以及组成细胞的形态和结构，研究由RTP组成的腭黏膜中基底层和棘层的分化情况。
（1）沿APD排列的RTP似乎与黏膜下层和乳头层内的血管及胶原束的方向有关。（2）为方便起见，根据形态和结构特征将基底细胞分为B1、B2和B3细胞。位于棘层下三分之一处的多面体棘细胞也分为S1P和S11细胞。（3）B1和S11细胞主要分布在乳头间区域（I区），B2和S1P细胞分布在乳头区域（P区），B3细胞分布在P区和I区之间（PI区）。（4）细胞分裂主要在APD的I区或PI区观察到，分裂后的细胞似乎变成B1细胞。B1细胞在P区过渡性地转变为B2或B3细胞，最终转变为S1P细胞，在I区转变为S1I细胞。
