<研究報告>上顎第一大臼歯の強い咬耗と関連する頭頂結節の弱い膨隆(英文)

概要

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In order to elucidate the formation mechanism of the parietal tuber, the correlations of the bregma-asterion arc with other cranial measurements were examined by means of the principal component analysis, taking account of the sex differences, the position of euryon and the degree of occlusal wear of the maxillary first molar. In result, it was found that the factor loadings of the principal component (PC) highly correlated with the b-ast arc had a significant rank correlation with those of the PC on dental wear differences. The PC on the positions of euryon also had a significant rank correlation with the same PC on dental wear differences in their factor loading variation patterns. From these findings, it was inferred that some factors causing dental wear such as biomechanical stress and/or aging were associated with the undeveloped or decreased swelling of the parietal tuber.