摘要目的 研究下颌偏斜患者的牙(牙合)特征及其与颅面形态的关系.方法 下颌偏斜患者31例(男9名,女22名),年龄12～26岁,平均年龄18岁.通过D.02-L 3D SCANNER三维牙颌模型激光扫描仪获得牙(牙合)三维特征,测量下颌偏斜畸形患者的头颅后前位片获得颅面骨骼特征,并对二者之间的关系进行统计学分析.结果 下颌偏斜患者的上下颌牙弓不对称,下颌偏斜侧的spee曲线(2.06±1.05)mm明显大于非偏斜侧(1.76±0.82)mm,P=0.038,上颌牙冠偏斜侧相对与非偏斜侧更为颊倾,下颌偏斜侧牙冠要相对舌倾,颏点的偏斜是一能有效衡量牙弓后部牙冠倾斜度差异以及(牙合)平面倾斜度的骨骼测量指标.结论 下颌偏斜患者表现出独特的骨骼和牙(牙合)特征,二者之间有着显著相关性.

abstractsObjective To investigate the relationship between mandibular deviation and dental arch anomalies. Methods Thirty-one patients with deviated mandible (9 males and 22 females) were included, with mean age of 18 years old (range from 12 to 26 years old). Dental casts were scanned and reconstructed three-dimensionally to analyze crown angulation and arch symmetry. Frontal cephalograms were analyzed to obtain the skeletal characteristics of the patients. Relationship between mandibular deviation and dental arch anomalies was analyzed. Results Patients with deviated mandible had dental arch asymmetry. The shifted side (2. 06 ± 1.05 mm) displayed steeper curve of spee than the contralateral side (1.76+0. 82 mm), (P=0. 038). On the shifted side, upper molars tipped labially and lower molars tipped lingually. On the contralateyal side, upper molars tipped lingually and lower molars tipped labially. Menton deviation was a valid parameter for skeletal and dental asymmetries. Conclusions Patients with mandibular deviation showed specific skeletal and dental characteristics and strong relationship existed between these features.