en Oral medicine Oral medicine Original article Original article <span dir="LTR"></span> <div style="text-align: justify;"><strong>Objectives: </strong>Attempts are ongoing to simplify the bonding procedure by decreasing the procedural steps. Universal adhesives were introduced to serve this purpose. This study aimed to evaluate the push-out bond strength of glass fiber posts in endodontically-treated teeth with two universal adhesives.&nbsp;<br> <strong>Materials and Methods: </strong>In this in vitro, experimental study, 22 single-rooted mandibular premolars were decoronated at their cementoenamel junction, endodontically treated and were randomly divided into two groups. The G-Premio Bond was used in the first and All-Bond Universal was used in the second group, according to the manufacturers&rsquo; instructions. Angelus fiber posts were cemented using RelyX U200 Automix self-adhesive resin cement. The roots were cut into 1-mm-thick sections perpendicular to the longitudinal axis of the tooth in the cervical, middle, and apical thirds. The push-out test was performed in a universal testing machine at a crosshead speed of 1 mm/min, and bond strength values were recorded. The failure modes were also determined. The data were analyzed using ANOVA and linear mixed models.<br> <strong>Results:</strong> The mean push-out bond strength was significantly higher in All Bond Universal than<br> G-Premio Bond (P=0.036). Also, there were statistically significant differences in the push-out bond strength of adhesives in different parts of the root canal (P=0.039). All failures were type 4 in both groups (adhesive failure between the dentin and resin cement).<br> <strong>Conclusion:</strong> All Bond Universal yielded superior push-out bond strength than G-Premio. However, further in vitro and in vivo studies with larger sample size are required for an evidence-based decision making.&nbsp;</div> Bond Strength, Endodontically Treated Teeth, glass Fiber Posts, Push-Out Test, Universal Adhesive 8 17 http://jrdms.dentaliau.ac.ir/browse.php?a_code=A-10-819-1&slc_lang=en&sid=1 A Valian avalian14@yahoo.com 10031947532846009547 10031947532846009547 No Dept of Restorative dentistry, School of Dentistry, Shahid Beheshti University of medical Sciences M Maghsoudlou maghsoudlou.mahsa@gmail.com 10031947532846009548 10031947532846009548 Yes Restorative Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran MS Roudbari roudbarisajjad@gmail.com 10031947532846009549 10031947532846009549 No Dept. of Restorative dentistry, School of Dentistry, Shahid Beheshti University of medical Sciences