Sampaio F C, Hossain A N, von der Fehr F R, Arneberg P
Department of Social and Clinical Dentistry, Federal University of Paraíba, João Pessoa, Brazil.
Community Dent Oral Epidemiol. 2000 Aug;28(4):307-13. doi: 10.1034/j.1600-0528.2000.280409.x.
Few reports have investigated caries prevalence in rural areas of Brazil.
The aim of this study was to observe the caries prevalence (DMFT, DMFS) in 12-year-old children living in rural villages of Paraíba, Brazil with low and moderate fluoride levels in the drinking water and to relate it to sugar intake and oral hygiene.
One hundred and ninety four children from 13 villages were grouped according to the water fluoride levels: low fluoride (LF, <0.2 ppm F, 96 children) and moderate fluoride (MF, 0.7-1.0 ppm F, 98 children). Caries and oral hygiene (OHI-S) were scored according to WHO criteria. Sugar intake was assessed through interviews. A sub-set of subjects (n=23) from the LF group was re-examined 2 years later.
For the LF and MF groups the DMFT (mean, SD) observed was 3.9 (3.7) and 2.5 (2.1) respectively, the DMFS was 9.2 (10.6) and 5.4 (5.7). Both indexes (DMFT, DMFS) showed significant differences (P<0.01, Mann-Whitney U-test) according to the fluoride levels in the drinking water. The mean increment of caries in the sub-set group of subjects was approximately 1.5 surfaces per subject/year. The reported sugar intake was low for both water fluoride groups (P>0.05). In a regression analysis the water fluoride levels, the use of fluoridated toothpaste and oral hygiene index were related to DMFS (R2=0.08, P< or =0.05).
Caries prevalence was lower in MF than in LF rural areas of Paraíba. Caries and sugar intake seems to be lower in rural areas than in urban areas of Paraíba with similar fluoride levels in the drinking water.
关于巴西农村地区龋齿患病率的报道很少。
本研究旨在观察生活在巴西帕拉伊巴州农村、饮用水氟含量低和中等的12岁儿童的龋齿患病率（DMFT、DMFS），并将其与糖摄入量和口腔卫生状况相关联。
来自13个村庄的194名儿童根据饮用水氟含量分组：低氟组（LF，<0.2 ppm F，96名儿童）和中等氟组（MF，0.7 - 1.0 ppm F，98名儿童）。根据世界卫生组织标准对龋齿和口腔卫生状况（OHI - S）进行评分。通过访谈评估糖摄入量。2年后对LF组的一部分受试者（n = 23）进行复查。
LF组和MF组观察到的DMFT（均值，标准差）分别为3.9（3.7）和2.5（2.1），DMFS为9.2（10.6）和5.4（5.7）。根据饮用水中的氟含量，两个指标（DMFT、DMFS）均显示出显著差异（P < 0.01，曼 - 惠特尼U检验）。受试者子集组中龋齿的平均年增加量约为每人每年1.5个牙面。两个饮用水氟组报告中的糖摄入量均较低（P > 0.05）。在回归分析中，饮用水氟含量、含氟牙膏的使用和口腔卫生指数与DMFS相关（R2 = 0.08, P ≤0.05）。
在帕拉伊巴州农村地区，MF组的龋齿患病率低于LF组。在饮用水氟含量相似的情况下，帕拉伊巴州农村地区的龋齿和糖摄入量似乎低于城市地区。
