Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 12 2 2015 04 15 90 8 Hossein Afshar Associate Professor, Dental Research Center Dentistry Research Institute, Department of Pediatric, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Yahya Baradaran Nakhjavani Associate Professor, Dental Research Center Dentistry Research Institute, Department of Pediatric, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Sedighe Rahro Taban Associate Professor, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. Zahra Baniameri Assistant Professor, Department of Pediatric, Faculty of Dentistry, Golestan University of Medical Sciences, Golestan, Iran. Azam Nahvi Associate Professor, Department of Pediatric, Faculty of Dentistry, Mazandaran University of Medical Sciences, Sari, Iran. 2015 10 16 This in-vitro study sought to assess the push-out bond strength of a total etch and 2 self-etch bonding systems to intracanal dentin of primary anterior teeth (PAT).Thirty-six primary anterior teeth were randomly divided into 3 groups of 5(th) generation (Single Bond 2), 6(th) generation (Clearfil SE) and 7(th) generation (Single Bond Universal) bonding agents. The canal orifice was restored with composite resin and the push-out test was carried out to assess the bond strength. After applying the push-out load, specimens were evaluated under a light microscope at 40X magnification. One-way ANOVA and log-rank test on Kaplan-Meier curves were applied for the comparison of bond strength among the 3 groups.The mean± standard deviation (SD) bond strength was 13.6±5.33 MPa for Single Bond 2, 13.85±5.86 MPa for Clearfil SE and 12.28±5.24 MPa for Single Bond Universal. The differences in bond strength among the 3 groups were not statistically significant (P>0.05).All three bonding agents are recommended for use with composite posts in PAT. However, due to high technical sensitivity of the Total Etch system, single or two-step self etch systems may be preferred for uncooperative children. https://fid.tums.ac.ir/index.php/fid/article/view/357 https://fid.tums.ac.ir/index.php/fid/article/download/357/333