Cho S Y, Lee C K, Chan J C Y
School Dental Care Service, Department of Health, Hong Kong.
Int J Paediatr Dent. 2004 Nov;14(6):446-50. doi: 10.1111/j.1365-263X.2004.00571.x.
Cases of congenitally missing permanent teeth involving only maxillary canines are uncommon. Prevalence studies have revealed that it is a rare finding in Caucasian populations, but it may be relatively more common in Asian groups. This report describes radiographic findings in 32 Chinese children with congenitally missing maxillary permanent canines. The aetiology of such an anomaly is obscure, but the racial difference in prevalence suggests that genetic factors may be more influential than environmental ones.
仅涉及上颌尖牙先天性缺失的病例并不常见。患病率研究表明，在白种人群体中这是一个罕见的发现，但在亚洲人群体中可能相对更为常见。本报告描述了32名上颌恒尖牙先天性缺失的中国儿童的影像学表现。这种异常的病因尚不清楚，但患病率的种族差异表明，遗传因素可能比环境因素更具影响力。
