The optical polarization method is used to study the distribution of tubules in human dentin. Horizontal sections of molars display circular local regions 1 mm in diameter and inclined with respect to the section surface, which are continuations of the pulp horns towards the crown cusps. They exhibit specific optical effects resembling conoscopic patterns, revealing the highly hierarchical structure of the crown dentin.
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Золотарев et al. (2001) studied this question.
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