The Effects of Different Post Space Conditioning Procedures and Different Endodontic Sealers on the Push-Out Bond Strengths of Fiber Posts

Objective: The bonding ability of intraradicular posts is important for successful restoration. Lasers have been used for this purpose. Both for post space conditioning and irrigation activation with lasers are interesting choices. The aim of this investigation was to evaluate the bond strength of fiber posts created via different irrigation and laser etching protocols on post spaces and different sealers. Methods: Ninety-six mandibular premolar teeth were randomly assigned to two main groups. GuttaFlow Bioseal and MTA Fillapex root canal sealers were used for obturation. Different irrigation and laser etching protocols for post spaces were used to perform subgroup procedures. One main group was filled with GuttaFlow Bioseal, and the other was filled with MTA Fillapex. The main groups were then subdivided according to the irrigation and laser etching protocols on the post spaces. The fiber posts were cemented and then transversally sectioned. Push-out tests were performed. The push-out strength values were subjected to statistical analysis. Levene’s homogeneity test was used to examine normally distributed variables. The group results were analyzed via two-way ANOVA to evaluate the effects of sealer type, post space preparation, irrigation system and their interactions. Results: The impacts of various post space conditions on the bond strength were not observed. (p > .05). However, a significant difference was reported between the two different sealers (p < .05). Conclusions: Post space conditioning procedures did not significantly affect the bond strength values. However, sealer alteration affected the bond strength values.