After adjusting for sex and ethnicity, carriers of the PART1 rs27565 TC or CC genotype who ate sugary food more than once a week had a 1.6-fold increase in their risk of dental caries compared to TT carriers who ate sugary food at most once a week (OR = 1.579, 95% CI = 1.032–2.414, P value = 0.035). This evidence concerns the gene PART1 and dental caries.