中国实用口腔科杂志

中国实用口腔科杂志 ›› 2010, Vol. 3 ›› Issue (11): 673-675.

• 论著 • 上一篇    下一篇

恒牙早期Angle Ⅱ错牙合畸形牙弓宽度的研究

  

  1. 1.大连市口腔医院 大连大学附属口腔医院，辽宁 大连  116021；2.中国医科大学口腔医学院，沈阳  110002
  • 收稿日期:2010-08-17 修回日期:2010-10-25 出版日期:2010-11-15 发布日期:2010-12-10

  • Received:2010-08-17 Revised:2010-10-25 Online:2010-11-15 Published:2010-12-10

摘要：

目的    探讨Angle Ⅱ错牙合畸形牙弓宽度与下颌骨形态结构之间的关系。方法    选择2005—2007年于中国医科大学口腔医学院正畸科就诊的46例Angle Ⅱ错牙合畸形患者为病例组，22例Angle I错牙合畸形患者为对照组。病例组再按Angle分类法分2组，即Angle Ⅱ1 组29例，Angle Ⅱ2 组17例。对全部患者治疗前石膏模型、X线头颅定位侧位片进行测量，测量结果进行统计学分析。结果    Angle Ⅱ2错牙合畸形患者的下颌体长度及下颌总长度小于Angle Ⅱ1及Angle I错牙合畸形患者，差异有统计学意义（P＜0.05）；Angle Ⅱ1和Angle Ⅱ2错牙合畸形患者上颌中、后段牙弓宽度均小于Angle Ⅰ错牙合畸形患者，上齿槽座点-鼻根点-下齿槽座点角（∠ANB）均大于Angle Ⅰ错牙合畸形患者，差异均有统计学意义 （P＜0.05）。结论    Angle Ⅱ错牙合畸形患者的上颌中、后段牙弓宽度小于Angle Ⅰ错牙合畸形患者。Angle Ⅱ1错牙合畸形患者的下颌后缩可能与上颌牙弓狭窄有关；Angle Ⅱ2错牙合畸形患者的下颌后缩可能与下颌骨的发育不足有关。

关键词: Angle Ⅱ错牙合畸形, 牙弓宽度 , X线头影测量分析

Abstract:

Objective    To explore the relationship between arch width and morphological characteristic of mandible in class Ⅱ malocclusion patients. Methods    Forty-six patients with class Ⅱ malocclusion and twenty-two patients with class Ⅰ malocclusion were selected from the Affiliated Stomatological Hospital of China Medical University from 2005 to 2007. Patients with class Ⅱ malocclusion were recruited as study cases and patients with class Ⅰ as controls. Study cases were divided into two groups by classified method of Angle： class Ⅱ division 1 group and class Ⅱ division 2 group. Eleven indexes of dental casts and cephalogram of the patients were measured before treatment. The significance of these parameters was analyzed. Results    A statistically significant difference in SNA，ANB，Go-Pg，Co-Pg，maxillary first premolars，maxillary second premolars and maxillary intermolar width was found between the three groups（P < 0.05）. Conclusions    The maxillary middle transverse arch width and posterior transverse arch width are narrower in patients with class Ⅱmalocclusion than in patients with class Ⅰ malocclusion. Patients with class Ⅱ division 1 malocclusion show that mandibular retrusion is associated with the narrowing of the maxillary transverse arch； the mandibular retrusion of the class Ⅱ division 2 malocclusion group is concerned with the hypodevelopment of mandible.

Key words: class Ⅱ malocclusion； arch width；cephalometric analysis