１例遗传性无牙畸形的家系分析庞震凌（河南南阳教育学院）河南４７３０００无牙畸形是一种先天性牙胚发育异常病症。有完全和部分畸形之分，常伴有汗腺、毛发等其它外胚层组织的发育异常，多数有家族史。本人仅曾见两例自古族家系报道，今报告１例通过调查而获得的遗传性... A Family Analysis of Hereditary Dental Deformity Pang Zhenling (Henan Nanyang Institute of Education), Henan 473000, China Toothless tooth deformity is a congenital tooth germ dysplasia. Complete and part of the deformity of the points, often accompanied by sweat glands, hair and other ectodermal dysplasia, most have a family history. I have seen only two cases reported since ancient ethnic families, this report 1 case was obtained through the investigation of hereditary ...