Background: The bariatric surgery may have negative repercussions on oral conditions.
Aim: To evaluate the impact of oral health educational/preventive program developed with patients submitted to gastroplasties.
Method: The sample consisted of 109 patients randomly allocated to two groups: intervention group (IG), where they participated in the oral health promotion program that include multiple educational-preventive approaches; control group (CG), where they received usual care from the bariatric clinic staff, without participation in the program.