
The occurrence of fused roots, pyramidal tooth form and taurodontism in the first and second permanent molars was studied on orthopantomograms in 96 twin pairs. The aim of the study was to analyze the prevalence of the mentioned abnormalities as related to the twin pair zygosity. fused roots were found in 19 pairs, pyramidal forms in 4 pairs, and taurodontism in 2 pairs of twins. Concordance recorded in all monozygotic twin pairs for all traits studied, simultaneous occurrence of more tha one abnormality in the same individuals, and bilateralism of their occurence, point to a high genetic determination of the traits studied.
tooth root; twins, tooth root, twins
tooth root; twins, tooth root, twins
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