中国北方正常年轻成人自然头位下软组织侧貌角度测量及分析

目的：拍摄中国北方正常年轻成人自然头位下软组织侧貌照片，测量面部各部位的角度值，建立关于中国北方正常年轻成人软组织侧貌角度值的基本数据库，为正畸和正颌外科医师临床诊治提供依据。方法：选取符合纳入标准的吉林大学在校生113人（女性67人，男性46人），拍摄其自然头位下的侧貌照片，采用Coreldraw测量软件对软组织侧貌进行定点测量，共测量面部角度项目12项。采用Dahlberg’s公式检测测量方法的可靠性。采用独立样本t检验比较男女性之间软组织侧貌各角度测量值平均值的差异。结果：除鼻唇角（Cm-Sn-Ls）、颏唇角（Li-Sm-Pg）和下面角（Sn-Trg-Me）外，其他角度测量方法的误差均较小。女性前鼻角（G-N-Prn）、鼻尖角（N-Prn/Sn-Cm）、颏唇角（Li-Sm-Pg）、面凸角（G-Sn-Pg）和全面凸角（G-Prn-Pg）的平均值大于男性（P < 0.05或P < 0.01），而男性垂直鼻角（N-Prn/TVL）和上三角（Pg-G-Prn）的平均值大于女性（P<0.01）。鼻唇角（Cm-Sn-Ls）和颏唇角（Li-Sm-Pg）的标准差比较大。结论：成功建立了中国北方正常年轻成人自然头位下面部软组织侧貌角度测量的数据库，为正畸和正颌外科医师临床诊治提供了依据。

Measurement and analysis of soft tissue facial profile of northern Chinese young adults under natural head position

Objective:To construct a database based on the analysis of the soft tissue profile of Northern Chinese young adults by means of angular measurement made on the standardized photographic records taken under natural head position, and to provide basis for the orthodontists and oral surgeons to make diagnosis and treatment in clinic.Methods:A total of 113 students (67 female and 46 male)who met the inclusion criteria from Jilin University were selected. The right profile records under natural head position were taken. The facial profile of soft tissue was analyzed by coreldraw software. A total of 1 2 angular parameters were detected. The reproducibility of the measurement was analyzed by Dahlberg’s formula.An independent sample t-test was used to analyze the differences in the measurement values of different soft tissue profile angles between different genders. Results:Except for nasolabial angle (Cm-Sn-Ls),mentolabial angle (Li-Sm-Pg),lower facial height angle (Sn-Trg-Me),the method errors of the other measurements were small.The mean values of nasofrontal angle (G-N-Prn),nasal angle (N-Prn/Sn-Cm),mentolabial angle (Li-Sm-Pg),angle of facial convexity (G-Sn-Pg),and angle of total facial convexity (G-Prn-Pg)of the female were greater than those of the male (P<0.05 or P<0.01), while the mean values of vertical nasal angle (N-Prn/TVL)and superior triangle (Pg-G-Prn)of the male were greater than those of the female (P<0.01).The standard deviation of nasolabial angle (Cm-Sn-Ls)and mentolabial angle (Li-Sm-Pg)were greater.Conclusion:A database based on the angular analysis of the soft tissue profile of Northern Chinese young adults under nature head position is obtained, which can provide basis for the clinical diagnosis and treatment of the orthodontists and oral surgeons.