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首页> 外文期刊>Journal of Clinical Microbiology >Prevalence of dental caries in 4- to 5-year-old children partly explained by presence of salivary mutans streptococci.
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Prevalence of dental caries in 4- to 5-year-old children partly explained by presence of salivary mutans streptococci.

机译：4至5岁儿童中龋齿的患病率在一定程度上可以归因于唾液变形链球菌的存在。

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The correlation between dental caries and the number of oral mutans group streptococci (ms) present has been shown to be weak. The aim of this investigation was to study associations between caries experience (decayed, missing, and filled surfaces [dmfs]) and the number of ms in stimulated saliva, with emphasis on the level of disease and the confounding effect of regular intake of sweets, the presence of salivary lactobacilli, and oral hygiene. In some 2,700 4- to 5-year-old South African children of different ethnic origins, caries was diagnosed on the basis of World Health Organization criteria and saliva samples were analyzed for ms after cultivation on mitis salivarius-bacitracin agar and for lactobacilli by using the Dentocult kit. Oral hygiene was scored on the basis of the Greene and Vermillion simplified debris index, while data on intake of sweets were derived from extensive interviews. Pearson's coefficient of correlation was computed, and multiple regression analysis was performed to correct for confounding factors. The distribution of the children in the eight caries classes was strongly associated with the ms class (P < 0.001), with those in the lower ms classes generally having low dmfs scores and those in the higher ms classes having dmfs scores distributed over the whole range. The r value for the two variables was 0.25 for the total material; this was reduced to 0.18 by correction for confounding factors. The corresponding values for children with caries were 0.21 and 0.17, for those in the 1 to 6 dmfs interval they were 0.07 and 0.03, and for those in the 7 to 81 dmfs interval they were 0.16 and 0.14. The data imply that the explanatory values for ms, those for the lower caries interval not counted, ranged from 6 to 2%. The unexpected results for children with caries might be due to their distribution pattern. It is concluded that there is a need for reevaluation of ms as a risk factor in dental caries.
机译：龋齿和口腔变形链球菌（ms）的数量之间的相关性很弱。这项研究的目的是研究龋齿经历（腐烂，缺失和充满的表面[dmfs]）与受刺激的唾液中ms的数量之间的关联，重点在于疾病的程度和定期摄入甜食的混杂影响，唾液乳酸杆菌的存在和口腔卫生。在世界各地不同种族血统的约2700名4至5岁的南非儿童中，根据世界卫生组织的标准对龋齿进行了诊断，并通过使用唾液杆菌-杆菌肽琼脂培养了唾液样本并分析了唾液样本中的毫秒数（通过使用Dentocult套件。口腔卫生是根据Greene和Vermillion简化碎片指数进行评分的，而甜食的摄入数据则来自广泛的访谈。计算了皮尔逊的相关系数，并进行了多元回归分析以纠正混杂因素。八个龋齿班级中儿童的分布与ms班级密切相关（P <0.001），较低ms级班级的孩子通常dmfs得分较低，而较高ms级班级的孩子dmfs得分分布在整个范围内。总材料的两个变量的r值为0.25;通过校正混杂因素，该值降低到0.18。龋齿儿童的相应值分别为0.21和0.17，1至6 dmfs区间的儿童分别为0.07和0.03，7至81 dmfs区间的儿童分别为0.16和0.14。该数据表明，ms的解释值（不计入下龋齿间隔的解释值）范围为6％至2％。龋齿儿童的意外结果可能是由于他们的分布方式。结论是需要重新评估ms作为龋齿的危险因素。

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