1) For the purpose of finding out some correlations between contraction of tuberculosis and teeth-line, teeth impressions of upper jaws were taken in tuberculous patients and healthy officials at Iwate National Sanatorium.
2) By gypsum models, the angle(α) between canine-teeth-line and line through caninetooth and inner incisors middle point, and the angle (β) between first-molaris-line and line through first molar and inner incisors middle point were measured.
3) By the angle α and β, teeth-line were divided in four Types : A, B, C & D.
4) The angle β seemed to be basal and the angle α delicator factor of dividing.
5) From Type A to D, the contraction disposition of tuberculosis seems to increase.
6) This dividing method seems to be a factor of constitution dividing, because the division was proved to have correlation with relative body-weight.
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