RESUMO
Background Dental caries in children is a public health concern affecting 60-90% of children worldwide. Dental caries perturbs children's eating ability, school performance as well as overall quality of life. This study aimed to determine the prevalence of dental caries and its risk factors among children aged 11 to 12 years in Nyarugenge District in Kigali, Rwanda. Methods The cross-sectional analytical study design involved 400 children from Nyarugenge district. By stratified sampling, we selected Gitega and Butamwa primary schools and used systematic sampling to choose the pupils into the sample. An interview and oral examination were performed. Descriptive statistics and logistic regression were done. Results Dental caries was observed in 25.5% of children. Deep pits and fissures carried a two-fold risk of getting dental caries than children without deep pits and fissures (OR = 2.4, 95% CI = [1.5; 4.0], P-value < 0.001). Dental plaque was identified as a risk factor for getting dental caries (OR=2.2, 95% CI = [1.2; 3.3], P-value: 0.01). Conclusion Dental caries is a public health concern associated with poor oral hygiene, deep pit, and fissures among children aged 11 to 12 years old. Oral hygiene education, application of ART, and regular screening programs are in need.