Objective: To study the relationship between primary tooth discoloration and caries in preschool children. Methods: 675 preschool children enrolled from 5 preschools in Suzhou City, China were examined for dental caries and tooth surface stain. Parents completed the questionnaires about their children's eating habit and living habit. The relationship between primary tooth discoloration and caries was analyzed with the respect to diet, hygiene, and the use of medicine or medical supplements. Results: Of the 675 children, 117(17. 3％; 52 boys and 65 girls) had tooth discoloration with no significant differences between gender(P＞ 0. 05). In the 117 children with tooth discoloration, 36(30. 8％) had dental caries, and in the 558 children without tooth discoloration 325 had caries (58. 2％, between the 2 groups, P＜ 0. 05). The incidence of discoloration was related with the frequency of consuming pigmented foods, vegetable and Chinese herbal medicines(P＜ 0. 05). The frequency of brushing teeth, use of water purifier and the water intake quantity were not significantly associated with discoloration of the teeth(P＞ 0. 05). Conclusion: The discoloration of primary teeth was negatively correlated with caries in primary teeth. Intake of pigmented food and medicine, vegetable and Chinese herbal medicine is related to tooth discoloration in preschool children.%目的: 探讨学龄前儿童乳牙色素沉着与乳牙龋的关系及影响因素.方法: 苏州市5 所幼儿园的675 名学龄前儿童进行儿童乳牙龋齿以及牙面色素检测,采用问卷调查了解儿童的饮食习惯以及生活习惯,分析儿童乳牙色素沉着与乳牙龋的关系,以及发生乳牙色素沉着的相关因素.结果: 675 名儿童中117 例(17. 3％) 乳牙面有色素沉着,男性52 例,女性65 例(P＞ 0. 05);其中36 例患龋,患病率为30. 8％.在558 例无乳牙色素沉着儿童中, 325 名患龋病,患病率为58. 2％.乳牙面无色素沉着与有色素沉着的儿童相比,患龋病的几率更高(P＜ 0. 05) .问卷调查显示,进食色素食物和药物、蔬菜、中草药频率高者色素沉着率较高(P＜ 0. 05) ,并与哮喘病史有相关(P＜ 0. 05) .儿童刷牙频率、是否使用净水器,以及每天的饮水量与乳牙面色素沉着没有关系.结论: 乳牙色素沉着与乳牙龋病呈负相关.影响学龄前儿童乳牙色素沉着的原因主要为进食色素食物和药物频率较高.
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