摘要
目的:探讨正畸治疗后上颌切牙前倾是否会引起上齿槽座角(SNA角)的变化。方法:实验组由25例(男12例,女13例)安氏Ⅱ类2分类患者组成;对照组由25例(男12例,女13例)上颌轻度拥挤患者组成,在正畸治疗过程中上颌切牙仅需少量移动或不需移动。通过头颅定位侧位片观察两组患者矫治前后上颌切牙的倾斜度和SNA角。结果:实验组矫治后上颌切牙前倾17.31°,相比矫治前有明显统计学差异(P<0.001);对照组矫治后上颌切牙前倾1.84°,相比矫治前无明显统计学差异(P=0.820)。相比矫治前,实验组和对照组矫治后SNA角均未发生明显变化(P=0.742;P=0.931)。结论:上颌切牙前倾不会引起SNA角的明显变化。
Objective To examine the effect of maxillary incisor proclination due to orthodontic treatment on sella- nasion- point A (SNA) angle. Methods A study group was formed from 25 subjects (12 male and 13 female) who had Class II division 2 malocclusion,and a control group was formed from 25 subjects (12 male and 13 female) who had minor crowding in the beginning of the treatment and required no or minimal maxillary anterior tooth movement. Treatment changes in maxillary incisor inclination and SNA angle were calculated on pretreatment and posttreatment lateral cephalographs. Results Maxillary incisors were significantly proclined (17.31o) in the study group and not significantly proclined (1.84o) in the control group. No significant change was observed in the value of the SNA angle in both the study and control groups. Conclusion Proclination of maxillary incisors does not significantly affect the SNA angle.
出处
《中国美容医学》
CAS
2015年第1期48-50,共3页
Chinese Journal of Aesthetic Medicine
基金
重庆三峡医药高等专科学校科研苗圃工程项目资助
