安氏Ⅰ类错合拔牙与非拔牙矫治前后牙弓宽度变化的对比研究

发布时间：2018-06-29 19:24

本文选题：拔牙矫治 + 非拔牙矫治　；参考：《青岛大学》2014年硕士论文

【摘要】：目的：通过对拔牙组和非拔牙组恒牙期安氏Ⅰ类错合畸形患者矫治前后的模型进行测量,分析拔牙组和非拔牙组病例治疗前后牙弓宽度的变化意义。方法：随机选择安氏Ⅰ类恒牙合患者40名,其中20人接受了拔牙治疗,均拔除4个第一前磨牙,20人接受了非拔牙治疗,分别在治疗前后的上下颌模型上第一磨牙近中颊尖点、尖牙牙尖点做标记,测量磨牙和尖牙间的牙弓宽度,进行统计学分析。结果：拔牙组矫治前后比较上下颌尖牙间宽度均增加,差异有统计学意义(P0.05) 非拔牙组矫治前后上颌第一磨牙间宽度增加,差异有统计学意义(P0.05)；非拔牙组矫治前后上下颌尖牙间宽度、下颌第一磨牙间宽度变化无统计学差异(P0.05)。拔牙组与非拔牙组矫治前后牙弓宽度差值的变化无统计学意义(P0.05)。结论：与非拔牙矫治相比,拔牙矫治并不会引起牙弓的缩窄。
[Abstract]:Objective: to study the changes of dental arch width before and after treatment in permanent teeth group and non-extraction group by measuring the models of class I malocclusion in permanent teeth of extraction group and non-extraction group before and after orthodontic treatment. Methods: forty patients with Class I permanent teeth were randomly selected, 20 of them were treated with extraction, and 20 of them were treated with non-extraction for the removal of 4 first premolars. The first molar proximal buccal cusp and canine cusp were labeled before and after treatment to measure the width of dental arch between molars and canines. Results: the width of maxillary first molar increased in the extraction group before and after orthodontic treatment, and the difference was statistically significant (P0.05). There was no significant difference in the width of maxillary canine and mandibular first molar before and after treatment in non-extraction group (P0.05). There was no significant difference in arch width between extraction group and non-extraction group before and after orthodontic treatment (P0.05). Conclusion: compared with non-extraction orthodontics, extraction treatment does not cause constriction of dental arch.
【学位授予单位】：青岛大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：R783.5

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