目的：研究少汗性外胚叶发育不全引起先天缺牙的ED1基因突变。
Objective: To detect ED1 gene mutation in three hypohidrotic ectodermal dysplasia (HED) nuclear families.
摘要目的研究一先天缺牙家系的遗传学特点并探寻其可能的致病基因。
Abstract : Objective To investigate the genetic characteristics of a family with congenital oligodontia and to find the possible disease-causing genes.
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。
Conclusion: Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies.
目的用先天性缺牙编码(TAC)及传统缺失牙位方式比较先天缺牙表型及基因型的相关性。
Objective to analyze the correlation between the phenotype and genotype of tooth agenesis using the tooth agenesis code (TAC) and the traditional descriptor for missing teeth.
本文收集先天多数牙缺失者28例，共缺牙313颗，平均每例缺牙11.2颗。
There are 313 teeth missed, average 11.2 every case, in the study of28 cases.
结论PAX9或MSX1基因突变导致的先天性缺牙表型有明显差异。
Conclusions PAX9 and MSX1 gene mutation can cause different phenotypes of tooth agenesis.
结论PAX9或MSX1基因突变导致的先天性缺牙表型有明显差异。
Conclusions PAX9 and MSX1 gene mutation can cause different phenotypes of tooth agenesis.
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