RESUMO
BACKGROUND: Parent-led toothbrushing effectively reduces early childhood caries. Research on the strategies that parents use to promote this behavior is, however, lacking. AIM: To examine associations between parent-child toothbrushing interactions and child oral health using a newly developed measure, the Toothbrushing Observation System (TBOS). DESIGN: One hundred children ages 18-60 months and their parents were video-recorded during toothbrushing interactions. Using these recordings, six raters coded parent and child behaviors and the duration of toothbrushing. We examined the reliability of the coding system and associations between observed parent and child behaviors and three indices of oral health: caries, gingival health, and history of dental procedures requiring general anesthesia. RESULTS: Reliabilities were moderate to strong for TBOS child and parent scores. Parent TBOS scores and longer duration of parent-led toothbrushing were associated with fewer decayed, missing or filled tooth surfaces and lower incidence of gingivitis and procedures requiring general anesthesia. Associations between child TBOS scores and dental outcomes were modest, suggesting the relative importance of parent versus child behaviors at this early age. CONCLUSIONS: Parents' child behavior management skills and the duration of parent-led toothbrushing were associated with better child oral health. These findings suggest that parenting skills are an important target for future behavioral oral health interventions.