作者
Mark Tummers, T Yamashiro, Irma Thesleff
发表日期
2007/11
期刊
Journal of dental research
卷号
86
期号
11
页码范围
1063-1067
出版商
SAGE Publications
简介
Mouse molars are normally not capable of continuous growth. We hypothesized that the mouse molar has intrinsic potential to maintain the epithelial stem cell niche and assessed this potential by growth in vitro. Although the tooth germs flattened considerably, they developed a mineralized crown and a root. However, histologically, the root surface was composed of 3 structurally different regions affecting the fate of the dental epithelium. The anterior and posterior aspects maintained the morphological and molecular characteristics of the cervical loop of a continuously growing incisor, with a continuous layer of ameloblasts. The epithelium making contact with the supporting filter resembled Hertwig’ss epithelial root sheath. The top of the cultured molar exposed to air lacked epithelium altogether. We conclude that the fate of the epithelium is regulated by external cues influenced by culture conditions, and that the …
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M Tummers, T Yamashiro, I Thesleff - Journal of dental research, 2007