Journal of Research in Dental and Maxillofacial Sciences

en Effect of Different Irrigating Solutions on Pushout Bond Strength of Composite Posts in Primary Teeth: An In Vitro Study pediatric pediatric Original article Original article <div style="text-align: justify;">Background and Aim: Restoration of anterior teeth is challenging in pediatric dentistry due to the poor retention of restorative material and the small size of the teeth. This study was conducted to investigate the pushout strength (PBS) of intra-canal composite posts in primary anterior teeth after using different root canal irrigants.    Materials and Methods: In this in vitro experimental study, 44 extracted primary anterior teeth were randomly assigned to four groups of (I) sodium hypochlorite (NaOCl), (II) ethylenediaminetetraacetic acid (EDTA), (III) saline, and (IV) chlorhexidine (CHX). Tooth crowns were cut by a high-speed handpiece 1 mm above the cementoenamel junction. After cleaning and shaping, the root canals were obturated, and post spaces were prepared. Composite resin was packed in the 3 mm coronal third of the canal. The teeth were thermocycled, and each tooth was sectioned into 1 mm slices at the mid-root. Next, the specimens were subjected to PBS testing. The mode of failure was determined under a stereomicroscope at ×40 magnification. Data were analyzed using one-way ANOVA and Games-Howell test (alpha=0.05).    Results: Saline showed the lowest (1.09±0.36 MPa), and NaOCl exhibited the highest (8.57±0.15 MPa) PBS (P<0.001). The difference in PBS between the EDTA and CHX groups was not statistically significant (P=0.115). Adhesive failure was more frequent than other failure modes. Conclusion: The results showed that root canal pretreatment with NaOCl enhanced the PBS of composite posts in primary anterior teeth.  </div> Composite Resins, Tooth, Deciduous, Sodium Hypochlorite 22 30 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-603-2&slc_lang=en&sid=1 Faezeh Roshani dr.nasim9977@gmail.com 100319475328460016454 100319475328460016454 No Dental Faculty, Ardabil University of Medical Sciences, Ardabil, Iran Kimia Jabarifard dr.kimiaj@gmail.com 100319475328460016455 100319475328460016455 No Dental Faculty, Ardabil University of Medical Sciences, Ardabil, Iran Navid Babaei navidby@gmail.com 100319475328460016456 100319475328460016456 No Dentist in Private Practice, Ardabil, Iran Somayeh Hekmatfar hekmatfar24@gmail.com 100319475328460016457 100319475328460016457 Yes Department of Pediatric Dentistry, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran