2022 Volume 56 Issue 1 Pages 71-77
Using Steiner, Downs and Northwestern analysis and Tweed triangle's parameters, we examined the facial characteristics of 20 male and 23 female Chinese adults with skeletal 1 malocclusion selected from an orthodontic clinic at Guangdong Pharmaceutical University, in China. Angular and linear measurements were determined. In comparison with pre-existing measurement values of Chinese children with skeletal 1 craniofacial morphology, maxilla showed more protruded and mandible showed more retruded. Mandibular anterior teeth showed more lingual inclination. Lower facial height was shorter. Compared to Japanese adults with skeletal 1 craniofacial morphology, mandible showed more retruded. Maxillary anterior teeth showed more labial inclination. Lower facial height was shorter. Compared to Caucasian adults with skeletal 1, maxilla showed more protruded and mandible showed more retruded. Maxillary and mandibular anterior teeth showed more labial inclination. Lower facial height was shorter. These results demonstrate that Chinese adults with skeletal 1 malocclusion tend to have forwardly positioned maxilla, mandible, and smaller facial height than the Japanese and Caucasians. In addition, the occlusal plane was found to have less inclination in the Chinese than in the Japanese, suggesting that the orthodontic treatment of Japanese individuals with skeletal 1 malocclusion will be easier than that of the Chinese. (J Osaka Dent Univ 2022; 56: 71-77)
