Who Gets Dental Caries? A Comprehensive Review

Dental caries is the world's most common non-communicable disease with a complex etiology including social, behavioral, medical, biological and economical elements. The distribution among populations and age groups is skewed, which calls for validated clinical tools to identify those with increased caries risk. The aim of this article was therefore to review risk factors for caries development in children, based on global prospective birth cohorts, genetic proceedings and data from validated risk assessment tools. The genetic elements involve four main categories comprising enamel quality, salivary composition, dental biofilm function and taste preferences. Recent studies suggest that genes may account for 35-55% of the variation in caries scores in the young permanent dentition. Prospective birth cohorts have pointed out poverty, socioeconomic level, early introduction and excessive sugar intake as significant factors for a child's dental caries trajectory up into adulthood. Moreover, prolonged breastfeeding, child obesity and maternal oral conditions are linked to the caries burden later in life. In the clinic, the strongest predictors are past caries history and selected behavioral and social factors. The performance of the validated caries risk assessment models is far from perfect, but still acceptable in terms of reliability during childhood. These tools are the best clinical practice since they add objectivity, consistency and documentation to the clinical routines. In addition, the dental staff has the advantage of using the outcome of the assessment for a structured risk communication with the caregivers. The protocol should also form the basis for a personalized intervention program addressing the entire family, with particular focus on maternal oral health and sugar reduction.