OBJECTIVES: The objectives of this research were to determine the effect of the cranberry on the adhesive capacity of dental plaque in the children of the Horacio Morales school in the city of Arequipa, Peru. METHODOLOGY AND METHODS: For this research, cranberry extract was tested on 17 10-year-old children at the Horacio Morales Delgado School in Arequipa, Peru. This research lasted two days, the first day we proceeded to brush teeth to children who remained for an hour without food intake, at the end of which they were taken the dental plaque index (control group). On the second day we also proceeded to brush the children’s teeth and immediately applied the Cranberry extract as a mouthwash, after an hour without having ingested any food or drink, we took the dental plaque index. RESULTS: The results obtained from the evaluation were measured with the dental plaque index which has val...