Rølling Steen, Poulsen Sven
Municipal Dental Service, Aarhus, Denmark.
Int J Paediatr Dent. 2009 May;19(3):172-5. doi: 10.1111/j.1365-263X.2008.00958.x. Epub 2008 Dec 14.
The purpose of this study was to describe agenesis of permanent teeth in children with respect to prevalence and intra-oral distribution according to gender.
The study was population based and included all children in one district of the municipality of Aarhus, Denmark, in 1974-1979 (1657 girls and 1668 boys) and 1992-2002 (2409 girls and 2404 boys). The children underwent systematical clinical and radiographic examination.
The period prevalence rates were almost identical for the two time periods (1972-1979: 7.8%; 1992-2002: 7.1%). Girls were affected more frequently than boys, and affected girls had more congenitally missing teeth than affected boys. Unilateral agenesis of the second premolars was more frequent than bilateral agenesis. In children with only one congenitally missing tooth, agenesis of the upper lateral incisors was asymmetrical in girls, but not in boys, whereas the opposite was true for the lower second premolars in boys.
The prevalence of agenesis of permanent teeth in Danish schoolchildren seems to be constant over time, and similar to that found in other large, population-based studies. Intra-oral distributions of congenitally missing teeth indicate gender-specific patterns.
本研究旨在描述儿童恒牙先天缺失的患病率及按性别划分的口腔内分布情况。
本研究以人群为基础，纳入了丹麦奥胡斯市一个区在1974 - 1979年（1657名女孩和1668名男孩）以及1992 - 2002年（2409名女孩和2404名男孩）的所有儿童。这些儿童接受了系统的临床和影像学检查。
两个时间段的期间患病率几乎相同（1972 - 1979年：7.8%；1992 - 2002年：7.1%）。女孩比男孩更易受影响，且受影响的女孩比受影响的男孩先天缺失的牙齿更多。第二前磨牙单侧先天缺失比双侧先天缺失更常见。在仅有一颗先天缺失牙的儿童中，上颌侧切牙先天缺失在女孩中不对称，但在男孩中并非如此，而男孩下颌第二前磨牙的情况则相反。
丹麦学龄儿童恒牙先天缺失的患病率似乎随时间保持稳定，且与其他基于大样本人群的研究结果相似。先天缺失牙的口腔内分布呈现出性别特异性模式。
