摘要
目的：为了解单纯牙列拥挤６ｍｍ内的错牙合畸形不拔牙矫治前、后上颌牙弓和牙轴的变化，探讨牙列拥挤不拔牙矫治的机理。方法：挑选１８例单纯牙列拥挤６ｍｍ内的错牙合患者，在模型上测量每位患者矫治前、后上颌牙弓长度、牙弓前段宽度、牙弓后段宽度及测量每位患者矫治前、后Ｘ线头颅侧位片上的ＳＮＡ角、ｌ－—ＡＰ距、上唇—ＥＰ平面距。结果：矫治后牙弓长度、牙弓前段宽度及ｌ－—ＡＰ距有明显改变（Ｐ＜０．０５），牙弓后段宽度及上唇—ＥＰ平面距无明显变化（Ｐ＞０．０５）。结论：通过前牙唇向倾斜移动，增加牙弓前段宽度及推磨牙向远中移动是临床工作中获得间隙排齐拥挤牙的有效方式，它在保证患者侧貌美观的同时。
objective: To understand the changes of pretreatment and posttreatment in the maxillary tooth arch and dental axis of patients with simply crowded teeth malocclusion, to study the principle of treating crowded teeth with a nonextraction approach Method: We selected eighteen patients with simply crowed teeth malocclusion (≤6 mm),the following parameters in pretreatment and posttreatment were measurde: the length of maxillary tooth arch ,the width of anterior and posterior tooth arch, angulation of sella nasion subspinale(SNA),upper incisor position(l-—AP)and distance of upper lip to H line Results: There were statistical significanty changes in the tooth arch length, anterior tooth arch width and upper incisor position (l-—AP) after treatment (P≤0 05),but there were insignificant changes in tooth arch posterior width and the distance of upper lip to H line(P>0 05) Conclusion:The findings indicate that it was a effective method of gaining space and aligning crowded teeth through moving upper incisor labioclination, increasing tooth arch anterior width and pushing molar distal movement Not only keeping patients aesthetic profile, but also follow current orthodontics developing trend, satisfy the patient's will of avoiding extraction as well
出处
《广西医科大学学报》
CAS
1998年第2期71-72,共2页
Journal of Guangxi Medical University
