Steiner分析を用いた中国人成人上顎前突症の形態学の研究

Using Steiner analysis we examined the facial characteristics of 35 male and 35 female Chinese adults with maxillary protrusion selected from a clinic in New Taipei City. Angular and linear measurements were determined. In comparison with pre-existing measurement values for Chinese children, the SNA angle, SNB angle, SND angle, L1 to NB (angle), Interincisal angle, and SL values for our subjects were significantly greater while the U1 to NA (mm), U1 to NA (angle), and SE values were significantly smaller. Compared to measurement values for Japanese, the SNA angle, ANB angle, U1 to NA (mm), U1 to NA (angle), Pog to NB, and SE were larger, and the SNB angle, SND angle, Interincisal angle, Occl to SN, and SL were smaller. These results demonstrate that there was excessive growth in Chinese adults with maxillary protrusion. The mandibles showed retrusion, and the degree of clockwise rotation was found to be less than in Japanese. In addition, with respect to the occlusal plane, the inclination in Chinese was less than in Japanese. Based on the above findings, it was suggested that maxillary protrusion in Chinese adults is easier to treat than in Japanese.大阪歯科大学2021年