Pirelli P, Ragazzoni E, Botti F, Arcuri C, Cocchia D
Section of Orthodontics, School of Dentistry, Faculty of Medicine, University of Rome Tor Vergata.
Minerva Stomatol. 1997 Sep;46(9):429-33.
In order to provide information on the morphological features of both human midpalatal suture and periodontal ligament, bioptic samples were obtained from patients whose age was between 10 and 30 years. The samples were embedded in epoxy resin, sectioned, stained with toluidine blue and observed by light microscopy. The periodontal ligament and the midpalatal suture appeared very similar with regard to the histological characteristics of the connective tissue but differed in the nature of the bone tissue associated to it. The alveolar bone lining the periodontal ligament was a bundle bone whereas the bone lining the connective tissue of the sutures was both lamellar and bundle bone. The absence of osteoblasts, osteoclasts or undifferentiated cells in the sutures under examination suggests that they are subjected to a slow bone turnover during their life cycle. On the contrary, the presence of mesenchymal cells in the periodontal ligament supports the notion that these cells are precursors of osteogenic cells involved in the high rate of bone remodelling that characterizes the alveolar bundle bone. The present results are discussed taking into account physiologic and therapeutic aspects of the two structures under examination.
为了提供有关人类腭中缝和牙周韧带形态特征的信息，从年龄在10至30岁之间的患者身上获取了活检样本。样本被嵌入环氧树脂中，切片，用甲苯胺蓝染色并通过光学显微镜观察。牙周韧带和腭中缝在结缔组织的组织学特征方面非常相似，但与之相关的骨组织性质不同。牙周韧带内衬的牙槽骨是束状骨，而缝合线结缔组织内衬的骨是板层骨和束状骨。在所检查的缝合线中没有成骨细胞、破骨细胞或未分化细胞，这表明它们在生命周期中经历缓慢的骨转换。相反，牙周韧带中存在间充质细胞支持了这样一种观点，即这些细胞是参与高骨重塑率的成骨细胞的前体，而成骨细胞是牙槽束状骨的特征。结合所检查的两种结构的生理和治疗方面对目前的结果进行了讨论。
