日本の二地方集団の歯の大きさに関する研究

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Measurements were taken of the crown diameter from central incisor to second premolar in 100 habitants in Okinawa and 61 habitants in Goto, Nagasaki. Sex and group difference in measurements and some indices derived from these measurements were examined. The results were as follows : I. Sex difference 1) The crown diameters were larger for male than for female, showing significant sex difference. 2) The length-breadth indices were generally higher for male than for female. Significant sex difference was observed for C′and P_1 of Okinawa group and for P^2 of Goto group. The buccolingual diameters were comparatively larger for male than for female. 3) As to reductive indices, significant sex difference was seen in the mesiodistal diameter of upper incisors of Okinawa group, and in the buccolingual diameter of lower premolars of Okinawa group and upper incisors and lower premolars of Goto group. Greater reduction was observed in female upper incisors and in male lower premolars. II. Group difference 1) The crown diameters were generally larger for Okinawa male than for Goto male and smaller for Okinawa female than for Goto female. Significant group difference was seen in female for I^1, I_1, I_2, C′, and P_1 in the mesiodistal diameter, for I^2, P^1, P^2, and P_2 in the buccolingual diameter, and for I_1, I^2, I_2, C′, P^1, and P_1 in the rectangle. 2) Significant group difference in the length-breath indices was observed for I_2 of male and I_1, I^2, and P^2 of female. The values for I_2 of male and I_1 of female were comparatively greater in the mesiodistal diameter for Okinawa group than for Goto group. However, the values for I^2 and P^2 of female were comparatively greater for Goto group than for Okinawa group. 3) Significant group difference in the reductive indices was observed in female for lower incisors in the mesiodistal diameter and for upper incisors in the labiolingual diameter. Greater reduction was observed in upper incisors for Goto group than for Okinawa group.
九州歯科学会の論文
1985-08-25

日本の二地方集団の歯の大きさに関する研究

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