垂直骨型对Ⅱ~1类错患者面下1/3软组织结构影响的研究

Study of the soft tissue structures in the lower anterior face in Class Ⅱ Division 1 patients with different vertical skeletal patterns

目的:研究不同垂直骨面型的成人Ⅱ~1类错患者面下1/3软组织结构的差异。方法:选取未经正畸治疗的180例成人Ⅱ~1类错患者分为高角(SN-MP角>40°)、均角(29°≤SN-MP角≤40°)、低角(SN-MP角<29°)3组。每组各有男、女30人。在头颅侧位定位片上分别测量上唇、下唇、颏部软组织结构的厚度与长度,并分析其在不同垂直骨面型个体间的差异。结果:男、女高角型Ⅱ~1类错患者上唇长度、下唇长度都较均角和低角患者明显增高(P<0.05);男性高角型Ⅱ~1类错患者下唇基部厚度也较均角和低角患者明显增高(P<0.05),而女性低角角型Ⅱ~1类错患者下唇基部厚度较均角和高角患者明显减低(P<0.05)。女性高角组患者的颏顶点处软组织厚度明显低于均角组和低角组患者(P<0.05),而男性不同垂直骨面型Ⅱ~1类错患者颏部软组织结构则未见明显的差异(P>0.05)。结论:垂直向骨型因素对Ⅱ~1类患者面下1/3软组织以厚度和长度为代表的结构有明显的影响。

Objective： To compare the structures of soft tissue in the lower anterior face of skeletal Class Ⅱ Division 1 subjects with various vertical patterns. Methods： 180 untreated adults with skeletal Class Ⅱ Division 1 malocclusion were divided into 3 groups based on SN-MP angle： low angle group（ SN-MP 〈 29）, normal angle group （29°≤ SN-MP≤40°） and high angle group （SN-MP 〉 40° ） （ n = 60, 30 men and 30 women）. The soft tissues in the lower anterior face were measured and analyzed by SPSS 13.0 software. Results： For upper lip length and lower lip length in men and women, high angle group showed significantly greater values than the other two groups （ P 〈 0.05 ）. For basic lower lip thickness, high angle men group had greater values than the other men groups （ P 〈 0. 05 ）, and low angle women group showed smaller values than the other women groups （ P 〈 0.05 ）. For the soft tissue thickness of chin, high angle women group showed smaller values than the other women groups （ P 〈 0.05 ） , and no significant difference was found among the 3 men groups （P 〉 0.05 ）. Conclusion： Vertical growth patterns have significant differences to facial soft tissue structures in lower anterior face in skeletal Class Ⅱ Division 1 subjects.