頭部エックス線規格写真分析による中国人成人skeletal 3顎顔面形態の研究

Using Steiner analysis and Wits appraisal, we examined the facial characteristics of 21 male and 19 female Chinese adults with reverse occlusion selected from a clinic in Ningbo City in Zhejiang, China. Angular and linear measurements were determined. In comparison with pre-existing measurement values of Chinese adults with skeletal 2 malocclusion, all measurement items indicated significant differences. Compared to Japanese, the ∠SNA, ∠SNB, U1 to NA (mm), U1 to NA (angle) and the Interincisal angle were larger and ∠ANB, L1 to NB (mm), L1 to NB (angle), ∠Occl to SN and ∠GoGn to SN were smaller. These results demonstrate that although maxillary undergrowth was not observed, overgrowth was seen in the mandible. We found that, vertically, compared to Chinese adults with a skeletal 1 malocclusion, those with a skeletal 3 had a short anterior facial height and a low angle in their maxillofacial morphology. It was also found that although the lower anterior facial height was shorter than that of Japanese, it was longer than that of Caucasians. In the denture pattern, Chinese adults with a skeletal 3 malocclusion, when compared to a skeletal 1, had more pronounced labial inclination of the maxillary incisors and lingual inclination of the mandibular incisors.大阪歯科大学2022年