IRCT20151006024381N2 IRCT 2017-12-28 Deputy of Research of Tehran University of Medical Sciences The effect of model-based training on periodontitis and gingivitis Assessing the effect of educational intervention based on HBM in incidence of periodontitis and gingivitis among adults 2017-12-06 anticipated 196 Complete https://irct.ir/trial/20600 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Prevention, Randomization description: Individuals randomly divided into two groups of intervention and control group. The number of people in each group is 98. N/A Condition 1: periodontitis. Condition 2: gingivitis. Intervention 1: In this interventional study, oral and dental health education is given in the standard bass method. In addition, education based on the health belief model is also provided for periodontitis and gingivitis. In the control group, no training is given. In . Intervention 2: Control group: No control intervention is performed in the control group. Only the scaling and determination of the index of the plaque and the volume of the envelope takes place. No - There is not a plan to make this available Justification or reason for not sharing IPD is In this study, because of a sample size of 196 people, no individual identifiable data is used. The name of the person with the phone number is taken entirely voluntarily and optionally.