CAJ | 학술논문

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（＜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（=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（=0.742；=0.931）。结论：上颌切牙前倾不会引起SNA角的明显变化。
목적：탐토정기치료후상합절아전경시부회인기상치조좌각（SNA각）적변화。방법：실험조유25례（남12례，녀13례）안씨Ⅱ류2분류환자조성；대조조유25례（남12례，녀13례）상합경도옹제환자조성，재정기치료과정중상합절아부수소량이동혹불수이동。통과두로정위측위편관찰량조환자교치전후상합절아적경사도화 SNA각。결과：실험조교치후상합절아전경17.31°，상비교치전유명현통계학차이（＜0.001）；대조조교치후상합절아전경1.84°，상비교치전무명현통계학차이（=0.820）。상비교치전，실험조화대조조교치후SNA각균미발생명현변화（=0.742；=0.931）。결론：상합절아전경불회인기SNA각적명현변화。
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.