中国实用口腔科杂志

中国实用口腔科杂志

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AngleⅠ类错牙合拔牙矫治前后模型分析

曹俊英，黄 宁   

  1. 郑州市第一人民医院口腔科，郑州
  • 收稿日期:2008-04-21 修回日期:2008-09-23 出版日期:2008-10-15 发布日期:2008-10-15

  • Received:2008-04-21 Revised:2008-09-23 Online:2008-10-15 Published:2008-10-15

摘要：

目的 观察AngleⅠ类错牙合拔牙病例矫治前后牙弓、牙槽骨、基骨的形态变化。方法 选取四川大学华西口腔医学院正畸科2006 — 2007年采用拔除4颗第一双尖牙进行矫治结束的典型AngleⅠ类错牙合病例，取矫治前后石膏模型，测量模型的牙弓、牙槽弓、基骨弓的长度、宽度，对矫治前后各项指标的变化进行统计分析。结果 （1）牙弓长度：总长度变短，牙弓前段变长（P < 0.05），中段变短（P < 0.05），后段变化不明显（P > 0.05）。（2）牙弓宽度：上下尖牙间宽度无明显变化（P > 0.05），第一、第二磨牙间变窄， （P < 0.05）。（3）牙槽弓及基骨弓长度及宽度：上下颌牙槽弓长度均变短（P < 0.05），宽度均变窄（P < 0.05）;上下颌基骨弓的长度均变短（P < 0.05），宽度均变窄（P < 0.05）。结论 AngleⅠ类错牙合拔牙矫治病例随牙齿移动的多少，矫治后其牙弓、牙槽弓、基骨弓的形态均有相应的变化。

关键词: 石膏模型, 牙弓, 牙槽弓, 基骨弓, ＡngleⅠ类错牙合

Abstract:

Objective To investigate the change in the dental arch dental-alveolar and basal bone shape after the orthodontic treatment. Methods Fifteen patients with class I malocclusion were selected. The first premolars were extracted for all patients.Before and after the treatment ，study models were cast. The length and width of dental-alveloar and the length and width of basal bone were measured;all the data were analyzed using proper statistical methods. Results （1）The length of the dental arch ： the anterior length of the dental arch was longer （P < 0.05）; the middle length of the dental arch was shorter（P < 0.05）. （2）The width of the dental arch：intercanine width changed （P < 0.05）; the first and second intermorlar width changed obviously（P < 0.05）.（3）The length and width of the dental-alveolar and basal bone：the length and width of the dental-alveolar was shorted（P < 0.05）; the length and width of the basal bone was shorted （P < 0.05）. Conclusion with the movement amount，appropriate changes are observed in the dental arch，dental-alveolar and basal bone shape of classⅠ malocclusion after extraction the treatment.

Key words: cast, dental arch, dental-alveolar bone , basal bone, AngleⅠ malocclusion