In this study, an errort was made to measure the Tweed triangle in assessing hard tissue, at the same time. to use the Z angle in assessing facial esthetics. The cephalometric radiograms were taken from thr Korean adult subjects, 19 to 25 years
old,
that consist of 20 males and 20 females with normal occlusion and harmonious profile, 6 items were statistically analysed.
@ES The results of this study were as follows:
@EN 1. In this study, standard values measured with 6 items in Korean were FMA 23.85°, IMPA 94.04°, FMIA 62.11°, Z angle 74.37°, Total chin 14.78mm and Upper lip thickness 12.70mm.
2. Mean of the Tweed triangle in Korean males was FMA 23.85°, IMPA92.18°, and FMIA 63.98°, in females, FMA 23.85°, IMPA 95.90°and FMIA 60.25°
3. Mean of measurement of the soft tissue in Korean males was Z angle 75.13°, Total chin 14.85mm and Upper lip thickness 13.15mm. In females, Z angle 73.63°, Total chin 14.70mm and Upper lip thickness 12.25mm.
4. As compared 6 items by sex, there is no significant difference except the FMIA among the 6 items(p<0.05).
5. As verified the correlation of the IMPA, FMIA and Z angle, there are correlations betweem FMIA and IMPA, FMIA and Z angle(p<0.001).
6. As compared with the present study, Japanese and caucasian, the mandibuler incisor of Korean was proclined more than the than that of Caucasian, the FMA was smaller than in Japanese. The Z angle and Total chin of Korean was larger than those
Japanese, but the upper lip thickness of Korean was smaller than that of Japanese.
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