Tehran University of Medical Sciences Frontiers in Dentistry 2676-296X 15 5 2018 10 10 300 308 EN Zohreh Estaki Postgraduate student, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences Hossein Afshar Professor, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences Sara Ghadimi Laser Research Center of Dentistry, Dental Research Institute, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences Samira Derakhshan Assistant professor, Department of Oral & Maxillofacial Pathology, School of Dentistry, Tehran University of Medical Sciences 2018 04 25 2018 07 14 Objectives: This in-vitro study aimed to compare the push-out bond strength of composite resin posts packed into the root canal of primary anterior teeth using two different layering techniques. Materials and Methods: Thirty-two primary anterior teeth were randomly divided into two groups. In group 1, after the preparation of post spaces, a posterior composite resin (Filtek P60) was packed in three horizontal layers by a composite condenser instrument with a cylindrical tip using the horizontal layering technique (HLT). In group 2, this was done using a condenser with a conical tip in three funnel-shaped layers according to the funnel-shaped layering technique (FSLT). Next, the specimens were subjected to push-out bond strength testing. Data were analyzed using t-test and the Kaplan-Meier curves. Results: The mean±standard deviation (SD) bond strengths of composite resin posts were 8.46±3.45 MPa and 7.7±2.24 MPa for the HLT and FSLT, respectively; the difference was not statistically significant (P=0.46). Conclusions: The layering technique by which composite resin was packed into the root canal of primary anterior teeth (HLT versus FSLT) had no significant effect on the push-out bond strength of composite resin posts.   https://fid.tums.ac.ir/index.php/fid/article/view/2527