The current article demonstrates the results of the histological examination of the inner microscopic structure of the enamel of the human temporary molar teeth, and also the comparison of the latter with the structure of the enamel of the human permanent molar teeth.
For the evaluation of the features of the inner structure of the enamel it was used the method of the polarizing microscopy. Using this method, the angles of inclination of the enamel rods to the dentin-enamel junction were measured in the inner, middle, and outer layers of the enamel. The examined areas of the enamel included vestibular, lingual and lateral surfaces of the crown, also the areas of their transition into one another, and grinding surface.
The conducted research revealed that there are significant differences between the inner structure of the enamel of the temporary molar teeth and that of the permanent ones. The enamel of the temporary molar teeth is characterized by predominantly straightforward pathway of the enamel rods, whereas the enamel of permanent molars, in most cases, exhibits the enamel rods that run more complicated, arc-shaped, pathways.
The obtained data may serve as a proof of the hypothesis that the enamel of the temporary teeth is to be the ‘primitive version’ of the enamel of the permanent teeth.