Obesity and dental caries in children are significant health problems. The aims of this review are to identify whether children aged 6 years and younger with overweight and/or obesity have higher dental caries experience compared with children with normal weight and, secondly, to identify the common risk factors associated with both conditions. Medline, Embase, and seven other databases were systematically searched followed by lateral searches from reference lists, grey literature, theses, conference proceedings, and contacting field experts. Longitudinal observational studies addressing overweight and/or obesity and dental caries in children aged 6 years and younger were included. A random effects model meta‐analyses were applied. Nine studies were included in this review. Children with overweight and obesity had a significantly higher dental caries experience compared with children with normal weight (n = 6). The pooled estimates showed that difference in caries experience between the two groups was statistically significant. Low levels of parental income and education were identified to be associated with both conditions in the sample population. Children with overweight and obesity are more vulnerable to dental caries. Low levels of parental income and education influence the relationship between the two conditions. However, the quality of evidence varied considerably; therefore, findings should be interpreted cautiously.

中文翻译：

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儿童肥胖和龋齿：系统评价和荟萃分析。

儿童肥胖和龋齿是严重的健康问题。这篇综述的目的是确定与体重正常的儿童相比，超重和/或肥胖的6岁及以下儿童是否有更高的龋齿经验，其次，确定与这两种情况相关的常见危险因素。系统搜索Medline，Embase和其他七个数据库，然后从参考文献列表，灰色文献，论文，会议记录以及与现场专家的联系中进行横向搜索。纵向观察研究涉及了6岁及以下儿童的超重和/或肥胖和龋齿。应用随机效应模型荟萃分析。本评价包括九项研究。与体重正常的儿童（n = 6）相比，体重超重和肥胖的儿童的龋齿经历明显更高。汇总的估计值表明，两组之间龋齿经历的差异具有统计学意义。父母的收入和教育水平低被确定与样本人群中的这两种情况有关。超重和肥胖的儿童更容易患龋齿。父母收入和教育水平的低下会影响这两个条件之间的关系。但是，证据的质量差异很大。因此，应谨慎解释发现的结果。父母的收入和教育水平低被确定与样本人群中的这两种情况有关。超重和肥胖的儿童更容易患龋齿。父母收入和教育水平的低下会影响这两个条件之间的关系。但是，证据的质量差异很大。因此，应谨慎解释研究结果。父母的收入和教育水平低被确定与样本人群中的这两种情况有关。超重和肥胖的儿童更容易患龋齿。父母收入和教育水平的低下会影响这两个条件之间的关系。但是，证据的质量差异很大。因此，应谨慎解释发现的结果。