摘要
作者对成都地区3～16岁中小学、幼儿园学生903人(男465人,女438人),采用Demirjian方法,以左下颌七颗恒牙估计牙成熟度,建立了成都地区3～16岁男女恒牙成熟分数标准,描绘了恒牙成熟分数曲线及七颗恒牙各个成熟阶段的年龄分布曲线。发现7～14岁女性牙成熟明显早于男性。恒牙各成熟阶段的年龄分布,男女差异在早期阶段很小(P>0.05),在后期女性明显早于男性(P<0.05)。
Dental maturity was studied in a groupof 903 healthy children (boys:465, girls:438) born in Chengdu from 1972 through1988. Dental maturity was estimated bythe method of Demirjian and Goldstein,which is based on the development ofseven left mandlbular permanent teeth;teeth formation was studied. The standardand curves of dental maturity for Chengduchildren (boys and girls) were construct-ed. At 3--5 years old, boy had their den-tal maturity slightly earlier than girls;there was no significant diference bet-ween boys and girls(P>0.05).At the ageof 7-14, girls were more advanced thanboys (P<0.05). Developmental curves of seven leftmandibular permanent teeth were plotted.The soxual difference was smaller at thecrown developmontal stage, and it increasedduring the root development. In all, girlswere more advanced by 0.45 year thanboys. The maximum average differencewas 0.85 year for the canine. The timethat each developmental stage has takenwas shorter in 50％ of girls as comparedwith that in boys, and it was longer in28％ of girls. There was no differencebetween boys and girls in the remaining22％ of cases.
出处
《华西医科大学学报》
CAS
CSCD
1990年第3期242-246,共5页
Journal of West China University of Medical Sciences
关键词
牙成熟度
牙钙化
牙龄
Dental maturity
Dental mineralization
Dental age
