Department of Pediatric Dentistry, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Am J Orthod Dentofacial Orthop. 2011 Mar;139(3):334-8. doi: 10.1016/j.ajodo.2009.04.024.
The aim of this study was to compare dental development in a group of children with mild-to-moderate hypodontia with a matched group.
A study group of 70 children (43 girls, 27 boys) with hypodontia, aged 5.3 to 12.5 years, was matched for race, age, and sex with 140 healthy, normal control subjects. The children's dental ages were calculated by using a modified dental-age estimation method. Differences between dental and chronologic ages were analyzed by t tests, and the correlations between differences in dental and chronologic ages and the numbers of missing teeth were analyzed with the Spearman correlation test.
Dental development in children with mild-to-moderate hypodontia was significantly delayed compared with the control group (P <0.05); however, the mean difference did not exceed 0.3 years in either sex. No correlation was observed between the differences in dental and chronologic age and the severity of hypodontia.
Children with mild-to-moderate hypodontia had delayed dental development of a few months; this was statistically significant. Because of individual variations, each patient should be carefully examined.
本研究旨在比较轻度至中度缺牙症患儿组与匹配组的牙齿发育情况。
研究组 70 名患有缺牙症的儿童（43 名女孩，27 名男孩），年龄在 5.3 至 12.5 岁之间，按种族、年龄和性别与 140 名健康、正常的对照组相匹配。采用改良的牙龄估计方法计算儿童的牙龄。通过 t 检验分析牙龄与实际年龄之间的差异，并用 Spearman 相关检验分析牙龄与实际年龄之间的差异以及缺失牙数之间的相关性。
与对照组相比，轻度至中度缺牙症患儿的牙齿发育明显延迟（P<0.05）；然而，在男性和女性中，平均差异均不超过 0.3 年。牙龄与实际年龄之间的差异与缺牙症的严重程度之间无相关性。
患有轻度至中度缺牙症的儿童的牙齿发育延迟了几个月，这具有统计学意义。由于个体差异，每个患者都应仔细检查。
