The global burden of oral diseases is high, but access to oral health care is still problematic, especially in low- and middle-income countries. The prevention of oral diseases in the child and adolescent population is the key as it can be prevented and potentially reversed at its early stages. This study aimed to provide evidence on the effectiveness of school-based oral health education in low- and middle-income countries through a systematic review and meta-analysis. Eligible studies had outcomes, such as oral health knowledge, behavior, oral hygiene, gingival health, and caries index, and those published from 1995 to 2019 in English. After screening and reviewing the retrieved articles, 20 studies were included in the systematic review and six eligible studies were selected for meta-analysis. The computed effect size of school-based oral health education in low- and middle-income countries showed improved knowledge, behavior, oral hygiene, and gingival health from the selected studies. However, most of the interventions took place for less than one year, and long-term evidence is still lacking. As repetition and reinforcement are critical in maintaining long-term effects, both country context and sustainability should be considered in school-based oral health education.
Keywords: adolescent; child; low- and middle-income countries; meta-analysis; school-based oral health education; systematic review.