Clinical effectiveness of picture exchange communication system (PECS) on 5- to 7-year-old children's oral health.

Purpose: To assess the impact of the picture exchange communication system (PECS) on oral hygiene motivation and practices in healthy children aged five to seven years.

Methods: A total of 160 healthy children aged five to seven years were included in this study. At the first visit, the participants' guardians were asked to answer a questionnaire focussing on the sociodemographic, and the oral hygiene habits of the participants.