LEVINE P T, GLIMCHER M J, BONAR L C
Science. 1964 Dec 25;146(3652):1676-8. doi: 10.1126/science.146.3652.1676.
A tissue layer, which was continuous with the cementum covering the roots, was found external to the crown enamel of normal, unerupted permanent human teeth. Light microscopy, x-ray diffraction, and amino acid analysis indicated that the major constituent of this tissue was collagen.
在正常未萌出的人类恒牙牙冠釉质外部发现了一层与覆盖牙根的牙骨质相连的组织层。光学显微镜、X射线衍射和氨基酸分析表明,该组织的主要成分是胶原蛋白。