乳歯列に関する研究 : 幼稚園児の石膏模型による調査

概要

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A total of 96 plaster models was made from children, 54 males and 42 females in the Hellman's dental age II A stage (aged 3 to 6 years). The mesiodistal crown diameters of the deciduous teeth and dimensions of the deciduous dental arches were obtained by measurements of plaster models. The plaster models were also observed status of the terminal plane and inter dental spaces. These results were compared with the data of Imamura and Ono. The results were as follows : These were no differences in the means of mesiodistal crown diameters of deciduous teeth between male and female. These were partly differences in the arch width and length between male and female. The percentage (rate) of the terminal plane of the vertical type, mesial step type and distal step type were 32.3,28.1,and 13.5 per cent respectively. The rate of the closed dental arch in the maxilla and mandible were 7.3 and 22.1 per cent respectively. These results were some differences in comparison with Imamura's and Ono's results.
福岡歯科大学学会の論文
1993-03-31