摘要
目的 :为了验证安氏II类 2分类错牙合与先天性牙异常如过小侧切牙、釉质发育不良、多生牙、易位牙、尖牙阻生和缺牙之间存在的关系。方法 :对 10 0例年龄 12～ 42岁未经历正畸治疗的II类 2分类错牙合患者的病史、口内、X片和牙模型进行检查 ,并进行样本百分比分析。结果 :结果显示牙异常者占 5 0 .0 0 %。 7.0 0 %的患者上侧切牙釉质发育不良 ,2 8.0 0 %过小侧切牙 ,4.0 0 %尖牙阻生 ,9.0 0 %下切牙缺失 ,易位牙为 2 .0 0 % ,无一例多生牙。 3 0 .0 0 %前牙Bolton比值不协调。结论 :安氏II类 2分类错牙合与过小侧切牙、釉质发育不良、先天缺牙密切相关。II类
Objective: To study the relationship between Angle Class II division 2 malocclusion and congenital anomalies of dentition, Methods: 100 untreated patients (aged 12～42 years old) with Class II division 2 malocclusion were investigated by history,general examination,radiograph and tooth model. The data of congenital tooth anomalies were analysed.Results: Congenital tooth anomaly was found in 50 of the patients. Upper lateral incisor enamel hypoplasia was found in 7 patients, small size of maxillary lateral incisor in 28, canine impaction in 4, missing of lower incisor in 9, transposition in 2 and anterior tooth Bolton ratio discrepancies in 30 of the patients. Conclusion: Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies. The main factors of anterior tooth Bolton discrepancies may be the small size of maxillary lateral incisor and absence of lower incisor.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2003年第4期377-379,共3页
Journal of Practical Stomatology
