摘要
目的探讨下颌第二恒磨牙错畸形的类型及相关因素,为正畸临床治疗提供一定参考。方法随机抽取105例符合条件的正畸病人为研究对象,对其记存模型及全口曲面断层片进行测量、记录和分析。结果下颌第二恒磨牙错发生率为40.95%,其中舌向错位占66.67%;下颌第二恒磨牙错与安氏Ⅱ类错、下颌第二恒磨牙处的牙槽弓宽度和后段牙弓拥挤度存在显著相关性(OR=4.621、0.745、0.914,P<0.01、0.05),而与下颌第一恒磨牙处的牙槽弓宽度、第三磨牙的存在情况、安氏Ⅲ类错之间无明显相关性(P>0.05)。结论临床上矫治下颌第二恒磨牙的错要考虑下颌后段牙弓的拥挤度及下颌第二恒磨牙区牙槽弓宽度。
Objective To investigate the types of malocclusion of lower second permanent molars and their related factors, in order to provide a reference for orthodontic procedure. Methods This study was conducted in 105 patients who met the orthodontic requirement, their models and panoramic radiographs were measured, recorded and analyzed. Data obtained were analyzed by software SPSS 13.0. Results The rate of the lower second permanent molar malocclusion was 40. 95 %. The lower second permanent molar malocclusion was significantly correlated with the width of lower alveolar arch at the lower second molar level, deficiency in space of posterior lower alveolar arches and the classification of Angle Ⅱ malocclusion （OR = 4. 621,0. 745, 0. 914; P〈0.01,0.05）. However, the malocclusion of the lower second permanent molars was not correlated with the width of lower alveolar arch at the lower first molar level, lower third molar and classification of Angle Ⅲ malocclusion （P〉 0.05）. Conclusion Clinically, the width of lower alveolar arch and the space of posterior lower alveolar arches should be considered in malocclusion correction.
出处
《齐鲁医学杂志》
2009年第4期345-347,共3页
Medical Journal of Qilu
