Li Y J
First Department of Oral Anatomy, School of Dentistry, Tokyo Medical and Dental University.
Kokubyo Gakkai Zasshi. 1996 Sep;63(3):489-515. doi: 10.5357/koubyou.63.489.
The purpose of this study was to investigate the function of human cementum from a morphological viewpoint. To accomplish this purpose, the incremental lines in human acellular cementum were studied by light microscopy, microradiogram (CMR), scanning electron microscopy, and transmission electron microscopy, and the results were as follows: 1. In acellular cementum, many fine incremental lines of about 0.5 micron width were observed. 2. The fine incremental lines were observed running perpendicularly or obliquely to Sharpey's fibers in the acellular cementum. 3. The fine incremental lines observed in acellular cementum were not straight lines but had wave-like structure. 4. Each wave observed in the fine incremental lines corresponded to a bundle of Sharpey's fibers. 5. The fine incremental lines observed on Sharpey's fibers in acellular cementum showed specific characteristic features. 6. Despite the fine incremental lines showing a close relationship to the degree of calcification, they also seemed to show a strong relationship to the quality of the organic component of the acellular cementum. 7. Apart from the fine incremental lines which are specific to acellular cementum, incremental lines similar to those observed in cellular cementum were also observed within the acellular cementum. These incremental lines were wider and their degree of calcification was higher.
本研究的目的是从形态学角度研究人牙骨质的功能。为实现这一目的，通过光学显微镜、显微放射照片（CMR）、扫描电子显微镜和透射电子显微镜对人无细胞牙骨质中的生长线进行了研究，结果如下：1. 在无细胞牙骨质中，观察到许多宽度约为0.5微米的细小生长线。2. 在无细胞牙骨质中，观察到这些细小生长线垂直或倾斜于沙比纤维排列。3. 在无细胞牙骨质中观察到的细小生长线不是直线，而是呈波浪状结构。4. 在细小生长线中观察到的每个波对应一束沙比纤维。5. 在无细胞牙骨质的沙比纤维上观察到的细小生长线呈现出特定的特征。6. 尽管这些细小生长线与钙化程度密切相关，但它们似乎也与无细胞牙骨质有机成分的质量密切相关。7. 除了无细胞牙骨质特有的细小生长线外，在无细胞牙骨质内还观察到与细胞牙骨质中观察到的类似的生长线。这些生长线更宽，钙化程度更高。
