Carter D H, Sloan P
Department of Oral Medicine, Turner Dental School, University of Manchester, England.
Arch Oral Biol. 1994 Nov;39(11):949-53. doi: 10.1016/0003-9969(94)90078-7.
Cryosections through the incisor and molar teeth of the rat mandible were examined, with and without hyaluronidase pretreatment, in the scanning electron microscope. In the fully erupted molar teeth the fibres of the periodontal ligament were organized into bundles which crossed the space from the alveolus to the cementum and inserted into the associated mineralized tissues. In the erupting incisor teeth, three distinct zones were evident. The outer alveolar and cemental zones were composed of coarse fibre bundles which inserted into the adjacent mineralized tissues, while the middle zone was composed of collagenous laminates running along the axis of the tooth. These observations confirm a proposed model for the structure of the erupting periodontal ligament and suggest that the method used will provide further information about the role of the ligament in tooth support and eruption.
对大鼠下颌骨的切牙和磨牙进行冷冻切片，在有和没有透明质酸酶预处理的情况下，用扫描电子显微镜进行检查。在完全萌出的磨牙中，牙周韧带的纤维组织成束，这些束穿过从牙槽到牙骨质的间隙并插入相关的矿化组织中。在正在萌出的切牙中，有三个明显的区域。外层的牙槽和牙骨质区域由插入相邻矿化组织的粗纤维束组成，而中间区域由沿牙齿轴线排列的胶原层组成。这些观察结果证实了关于正在萌出的牙周韧带结构的一个提出的模型，并表明所使用的方法将提供关于韧带在牙齿支撑和萌出中的作用的进一步信息。
