Ⅱ类Ⅰ分类不同垂直骨面型成人口周软组织特征的头影测量分析

A lateral cephalometric study of perioral soft tissue of the sbjects with Class Ⅱ Division Ⅰ and various vertical patterns

目的:比较Ⅱ类Ⅰ分类不同垂直骨面型成人口周软组织的特征与差异。方法:采用X线头影测量技术,对90名Ⅱ类Ⅰ分类低角、均角、高角各30例垂直骨面型成人(男、女各半)的头颅定位侧位片进行测量分析,比较口周软组织的差异。结果:低角组下唇基部厚度、下唇长度小于高角组(P<0.05);多数测量项目的性别间比较显示男性大于女性,特别是上唇基部厚度和上、下唇厚度(P<0.05)。结论:正畸医生在临床工作中应当了解并重视这种差异,为患者建立更加和谐美好的面容。

Objective： To study the perioral soft tissue characteristics of the subjects with Class II Division I and various vertical pat- terns. Methods： Lateral cephalograms of 90 adults （ half men, half women） were divided into 3 groups based on GoGn- SN angle ： low angle, normal angle and high angle（n = 30）. The perioral soft tissues were measured and compared for the determination of the vertical skeletal variables influencing soft tissue characteristics. Results： The subjects with low angle showed significantly smaller values than those with high angle for basic lower lip thickness and lower lip length （ P 〈 0.05 ）. Most measurements of soft tissue thickness were greater in men than in women in all groups, especially for basic upper lip thickness and upper lower lip thickness（P 〈 0.05）. Conclu- sion： Orthodontists need to pay more attention to the differences of perioral soft tissue in the subjects with various vertical patters to ob- tain balance of the facial harmony in orthodontic treatment.