利用Demirjian法判断928例青少年下颌恒牙的发育时间  

Study on development time of mandibular permanent teeth with Demirjian method in 928 children

作　　者：费越[1] 汪俊[1] FEI Yue WANG Jun(Department of Pediatric Dentistry, Shanghai Ninth People＇s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine,Shanghai Key laboratory of Stomatology,National Clinical Research Center of Stomatology. Shanghai 200011, China)

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院儿童口腔科上海市口腔医学研究所国家口腔疾病临床研究中心,上海200011

出　　处：《上海口腔医学》2017年第5期565-568,共4页Shanghai Journal of Stomatology

摘　　要：目的:制作5~15岁儿童下颌恒牙发育时间表,分析各恒牙的发育高峰期,探讨恒牙发育的性别差异。方法:利用Demirjian法记录928名5~15岁儿童及青少年的下颌恒牙发育分期,采用SPSS 22.0软件包绘制各恒牙的发育折线和发育拟合曲线,列表汇总重要发育节点的年龄值,记录发育折线的斜率增大区间,比较男女恒牙发育的异同。结果:恒中切牙、恒侧切牙均在6.50~7.50岁经历发育高峰期,而第一、第二恒前磨牙则为7.00~8.00岁。男性下颌第一恒磨牙的发育高峰期在6.50~7.50岁和8.50~9.50岁。女性的发育整体早于男性,但发育曲线并无显著不同。结论:本研究确定了适合本地区青少年的下颌恒牙发育高峰期与发育时间表,与其他地区和人种的数据存在差异。女性下颌恒牙的发育先于男性,各牙的发育曲线相似。PURPOSE： This study aimed to establish the developmental timetable of mandibular permanent teeth in children aged 5-15 years, and analyze the rapid developmental range of each permanent tooth and explore the gender differences in development of permanent teeth. METHODS： Nine hundred and twenty eight children aged 5-15 years were included, the stage of each mandibular permanent teeth was recorded with Demirjian method. The developmental lines and the fitting curves of each tooth were drawn. The age of the important development nodes was summarized, and the slope of the developmental line was recorded. The similarities and differences between male and female were analyzed with SPSS 22.0 software package. RESULTS： Mandibular permanent incisors were found to experience their developmental peak from 6.50 to 7.50 years old, while mandibular permanent premolars＇ developmental peak were 7.00- 8.00 years old. Boys＇ mandibular first molar reached their peak from 6.50 to 7.50, 8.50 to 9.50 years old, while girls＇ teeth developed earlier than that of boys, but the developmental rate was similar. CONCLUSIONS： In this study, the developmental peak and developmental timetable of mandibular permanent teeth suitable for the domestic population were obtained, which was different from the data of other regions and ethnic groups. Females began their mandibular permanent teeth development earlier than males, but the development curve of each tooth was similar.

关 键 词：下颌恒牙发育时间表 发育高峰期 性别差异 

分 类 号：R788[医药卫生—口腔医学]