The association of taurodontism with hypoplastic/hypomature enamel defects is presented in two cases of X-chromosome aneuploidy (47,XXY) and one of X-linked recessive Amelogenesis Imperfecta. It appears that the X-chromosome not only plays some role in tooth size the degree of taurodontism increasing with increased number of X chromosomes), but probably also plays a role in enamel maturation.
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J. P. Gage (1978) studied this question.
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