IRCT20180624040221N1 IRCT 2018-10-27 Rasht University of Medical Sciences Comparing the effect of three different oral hygiene instruction methods: brochure, educational video and lecture on plaque index of 8-9 years old children Comparing the effect of three different oral hygiene instruction methods: brochure, educational video and lecture on plaque index of 8-9 years old children 2018-11-22 anticipated 72 Complete https://irct.ir/trial/33612 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Education/Guidance, Randomization description: The list of second grade students in the selected schools was prepared prior to the beginning of the study and seeing the students. Two lists of 36 were found, one for girls and one for boys. Then from each list, the first three students were assigned to the brochure group, the second three students to the film group and the third three student to the third group of lectures, and three to three students were divided accordingly. N/A Dental decay and periodontal disease. First intervention group: Training group with brochure. - Second intervention group: Training group by educational film. - Third intervention group: Teaching group with lectures.. Yes - There is a plan to make this available What will be shared: The data includes the name and gender of the children as well as information on the three periods of measuring their plaque index scores. When: The start of the access period is 6 months after the results are printed. To whom: Researchers working in academic and scientific institutions and those involved in child health education. Conditions: Certain other conditions are not currently available. Where to obtain: Applicants can go to the email address provided here: Marvashabrang@gmail.com How to obtain: After sending the email and requesting the data, the applicant must explain the reason for asking and explaining how the information is used and after one week his application will be reviewed and answered. Comments: