Crooks M C
N Z Dent J. 1990 Apr;86(384):39-41.
The prevalence of developmental defects of enamel of 1,417 Cook Island children aged 9-20 years on the island of Rarotonga was recorded in 1987. The labial surfaces of the 12 anterior teeth were examined and classified using the modified Developmental Defects of Enamel Index (DDE). At least 1 tooth with defective enamel was seen in 403 (28.4 percent) of subjects; 7.1 percent of all teeth were affected. These results show overall an intermediate prevalence in comparison with studies in other countries. The three most prevalent defects were: diffuse patchy opacities (2.4 percent of all teeth), demarcated white-cream opacities (1.6 percent), and hypoplasias (1.2 percent). The upper central incisors were the teeth most frequently affected. The prevalence of defects did not differ by age or sex. Most defects (40 percent) were located over the incisal third of the labial surface, and affected less than one-third of the labial tooth surface (76 percent).
1987年，记录了拉罗汤加岛上1417名9至20岁库克群岛儿童的釉质发育缺陷患病率。检查了12颗前牙的唇面，并使用改良的釉质发育缺陷指数（DDE）进行分类。在403名（28.4%）受试者中，至少有1颗牙齿出现釉质缺陷；所有牙齿中有7.1%受到影响。与其他国家的研究相比，这些结果总体显示出中等患病率。三种最常见的缺陷是：弥漫性斑片状混浊（占所有牙齿的2.4%）、界限清晰的白色奶油状混浊（1.6%）和发育不全（1.2%）。上颌中切牙是最常受影响的牙齿。缺陷患病率在年龄或性别上没有差异。大多数缺陷（40%）位于唇面切缘三分之一处，且影响不到唇面牙齿表面的三分之一（76%）。
