论文部分内容阅读
目的:观察正畸患者中伴有恒牙先天缺失、多生牙和锥形牙或过小牙的发生率及分布,并分析其相关性。方法:随机抽取正畸患者800例,男260例,女540例,年龄12~40岁。通过石膏模型和曲面断层片统计先天缺牙、多生牙、锥形牙或过小牙的发生率及分布。通过分类变量的关联性来分析多生牙和锥形牙或过小牙与先天缺牙的相关性,假设检验采用列联表的独立性x2检验,并采用Pearson列联系数r来描述两变量关联程度。结果:800例中发生恒牙先天缺失100例,发生率为12.5%。常见的缺失牙位从多到少依次为下颌侧切牙、下颌第二前磨牙、下颌中切牙、上颌侧切牙、上颌第二前磨牙。多生牙的发生率为3.1%,锥形牙或过小牙占8.3%。通过分类变量的关联性分析得出,锥形牙或过小牙的发生与先天缺牙有相关性,Pearson列联系数r为0.173。结论:正畸患者中恒牙先天缺失的发生率为12.5%,最常见的缺失牙位是下颌侧切牙和下颌第二前磨牙;正畸患者中恒牙先天缺失和锥形牙或过小牙的发生具有相关性。
OBJECTIVE: To observe the incidence and distribution of congenital tooth defects with congenital defects, adulterated teeth, conical teeth or oversized teeth, and analyze their correlations. Methods: 800 orthodontic patients were randomly selected. There were 260 males and 540 females, aged from 12 to 40 years old. The incidence and distribution of congenital missing teeth, adulterated teeth, conical teeth or over-small teeth were calculated through the gypsum model and the curved surface slice. The association of adolescent and conical or oversized teeth with congenital edentis was analyzed by the association of categorical variables. Assuming the test was independent x2 of the contingency table and the Pearson’s corollary r was used to describe both variables Relevance Results: One hundred cases of permanent tooth birth were found in 800 cases, the incidence was 12.5%. The most common missing teeth were mandibular lateral incisors, mandibular second premolar, mandibular central incisor, maxillary lateral incisor and maxillary second premolar. The prevalence of multiple births was 3.1%, with conical or oversized teeth accounting for 8.3%. According to the correlation analysis of categorical variables, the occurrence of conical teeth or oversized teeth is related to the birth of edentulous teeth. Pearson’s coefficient of association r is 0.173. CONCLUSIONS: The incidence of congenital tooth loss in orthodontic patients was 12.5%. The most common missing teeth were the mandibular lateral incisor and the mandibular second premolar. In orthodontic patients, the permanent tooth was congenital with conical teeth or oversized teeth The occurrence of a correlation.