IRCT20180104038218N1 IRCT 2018-04-02 Qazvin University of Medical Sciences Comparison of Three Different Therapeutic Approaches in School-Aged children with Sleep Bruxism Efficacy Comparison of Three Approaches of Pharmacotherapy, Appliance Therapy and Psychotherapy on Sleep Bruxism Reduction of 6 to 12-year-old children 2018-02-04 anticipated 33 Complete https://irct.ir/trial/29035 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: By simple lottery, the order of filling the intervention groups was determined and numbers of 1 to 3 assigned to each of the interventions. Each of the samples was assigned a number from 1 to 33. By random selection of the starting point in the table of random numbers, the movement in the horizontal or vertical path continued, the first number smaller than 33 as the first sample entered group one, followed by the other numbers less than 33. After capacity completion of the first group, groups two and three were completed in the same way, Blinding description: Outcome evaluation will be implemented by an intervention-blind operator other than researcher and care taker, using randomized numbers for each sample. Results are delivered to statistician by numbers. N/A sleep bruxism. Intervention 1: Intervention group: 10 sessions (3 months) of psychological therapy and relaxation training using the Benson model. Intervention 2: Intervention group: appliance therapy with hard night guard for 3 months. Intervention 3: Intervention group: Pharmacotherapy with oral Lorazepam 0.05 mg / kg for 1 month. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is no additional data exists