<研究報告>永久歯歯冠近遠心径における左右非対称性の鏡像現象と遺伝的変異性

概要

論文の詳細を見る
On the mirror imagery specific to monozygotic twinning and the genetic variability of right-left differences, the mesiodistal tooth crown diameters of the permanent teeth, from the central incisors to the second molars, of both jaws were examined in Japanese monozygotic and dizygotic twins. The results of the chi-square tests showed that the frequency of mirror images in monozygotic twins was not significantly higher than that in dizygotic twins for any of the teeth examined, suggesting no mirror imagery due to the so-called mirror-image mechanism in monozygotic twinning. The comparisons of the mean intrapair variances of the right-left differences in monozygotic and dizygotic twin pairs suggested that there were no or little genetic variances in the right-left differences of the mesiodistal tooth crown diameters of the permanent teeth.
国立科学博物館の論文