ارزش غذايي سرشاخه و ميوه دوگونه مدتعي كهور و آكاسياي چتري

Background and Aim: The caries preventive effect of pit and fissure sealants have been documented and their success, in this regard, is directly related to the retention rate of them. The aim of this study was to compare the retention rate of sealants with and without mechanical preparation of enamel by bur. Materials and Methods: In this randomized clinical trial, 37 children referred to Pedodontics Department, Faculty of Dentistry, Tehran University of Medical Sciences were selected based on inclusion and exclusion criteria. A total number of 128 permanent first molars were randomly divided into two groups: Case group (mechanical preparation by bur) and control group (conventional method without bur preparation). Following fissure sealant application, patients were followed up every 4 months. Data were subjected to McNemar test. Results: After one year, the complete retention rate in case group was 81.3% and in control group was 70.3%. Statistical analysis for matched pairs showed statistically significant difference between two groups (P=0.04) Conclusion: The application of bur resulted in superior sealant retention revealing the effectiveness of but application prior to sealant therapy in caries prevention.