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目的:通过临床验证自锁矫治体系的作用效果,为临床高效、合理地选择矫治体系提供参考。方法:临床选取不需拔牙的安氏Ⅱ类2分类错畸形患者20例,随机分为两组,每组10例。实验组接受自锁矫治系统,对照组接受直丝弓矫治系统,均戴入上颌平面导板打开咬合。矫治前后分别拍摄X线头颅定位片,制取记存石膏模型。选取X线硬组织和石膏模型指标分析测量,配对t检验,比较两种方法矫治前后牙颌组织的变化有无统计学差异。结果:两种方法矫治前后上、下牙弓宽度和牙弓长度均增加,但两组间差异无统计学意义(P>0.05);两种方法基骨弓宽度均略有增加,两组间的差异有显著性(P<0.05);两种方法上颌基骨弓长度治疗前后未见明显增加,下颌基骨弓长度治疗前后均有明显增加,上下前牙唇倾度均有明显改善,但两组间,无明显差异。治疗完成时间实验组比对照组缩短,两组间有显著性差异。结论:自锁系统能够扩展牙弓和基骨弓宽度,唇倾前牙,有利于三维方向解除闭锁,在扩展基骨弓宽度上,略优于直丝弓,配合平面导板,可防止托槽脱落、快速打开咬合,缩短治疗时间,特别适合用于安氏II类2分类错畸形的矫治。
Objective: To validate the effect of self-locking orthodontic system and provide a reference for the clinical choice of orthodontic system efficiently and reasonably. Methods: Twenty cases of Class Ⅱ division malocclusion without tooth extraction were randomly divided into two groups (n = 10 in each group). The experimental group received self-locking correction system, while the control group received straight wire arch correction system, both of them were worn into the maxillary plane guide to open the bite. Before and after treatment were taken X-ray skull positioning film, prepared memory gypsum model. Select X-ray hard tissue and gypsum model index analysis and measurement, paired t test, compare the two methods before and after the treatment of dentition and jaw changes were statistically significant. Results: The width and arch length of upper and lower dental arch both before and after the two methods were increased, but there was no significant difference between the two groups (P> 0.05). Both methods had a slight increase in width of the bone arch, (P <0.05). There was no significant difference between the two methods before and after the treatment of maxillary base bone arch length. The length of mandibular base bone arch increased obviously before and after treatment. There was no significant difference between the two groups. The completion of treatment experimental group than the control group shortened, there were significant differences between the two groups. Conclusion: The self-locking system can expand the width of the arch of the dental arch and the base of the bone, and the lip-tilt anterior teeth, which is beneficial to unlock the three-dimensional direction. It is slightly better than the straight wire arch in expanding the width of the base arch, Off, quickly open the occlusion, shorten the treatment time, especially for Class II Division 2 malocclusion correction.