Gu Yan, Hagg Urban, Wu John, Yeung Shadow
Department of Orthodontics, Peking University School and Hospital of Stomatology, PR China.
Aust Orthod J. 2011 Nov;27(2):155-61.
To compare the dentofacial characteristics of southern and northern Chinese adolescents.
A southern Chinese sample comprised 70 males (Mean age 12.4 +/- 0.60 years) and 60 females (Mean age 12.5 +/- 0.4 years), and a northern Chinese sample consisted of 50 males (Mean age 12.8 +/- 1.8 years) and 50 females (Mean age 12.4 +/- 1.2 years). All subjects had a Class I molar relationship with no or minimal crowding, a well balanced cephalometric profile, and no history of orthodontic treatment. Patient cephalograms were traced and digitized and McNamara's analysis applied.
A smaller midface and a shorter overall mandibular length were observed in southern Chinese, whereas significantly increased vertical dimension and a retrusive chin were noted in northern Chinese. Protrusive upper and lower incisors and a protrusive upper lip were found in southern Chinese.
There were significant differences in dentofacial morphology between southern and northern Chinese adolescents. It is suggested that separate cephalometric norms be used for patients originating from different parts of China.
比较中国南方和北方青少年的牙颌面特征。
中国南方样本包括70名男性（平均年龄12.4±0.60岁）和60名女性（平均年龄12.5±0.4岁），中国北方样本由50名男性（平均年龄12.8±1.8岁）和50名女性（平均年龄12.4±1.2岁）组成。所有受试者均为Ⅰ类磨牙关系，无或仅有轻度牙列拥挤，头影测量轮廓良好，且无正畸治疗史。对患者的头影测量片进行描图和数字化处理，并应用McNamara分析法。
中国南方青少年的面中部较小，下颌整体长度较短，而中国北方青少年的垂直维度显著增加，颏部后缩。中国南方青少年存在上下切牙前突和上唇前突的情况。
中国南方和北方青少年的牙颌面形态存在显著差异。建议对来自中国不同地区的患者采用不同的头影测量标准。
