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. Author manuscript; available in PMC: 2016 Dec 1.
Published in final edited form as: Mater Sci Eng C Mater Biol Appl. 2015 Aug 1;57:434–451. doi: 10.1016/j.msec.2015.07.050

Fig.1.

Fig.1

Histological section of the developing human tooth in the maturation stage (left) and a micrograph showing parallel arrangement of enamel rods (right). 1 – ameloblasts; 2 - enamel; 3 – dentin; 4 – odontoblasts; 5 – pulp. Each enamel rod is composed of a myriad of thin apatite fibers, each with approximately 40 – 60 nm in diameter.