Retention of Five Pre-Fabricated Post systems and gold cast post

Objective: The purpose of this in Vitro study was to compare the adhesion of five prefabricated post systems and gold cast post. Methods: Sixty extracted human, single-rooted, decoronated maxillary central incisors were divided into 6 groups of ten. Canals were prepared utilizing ProFileTM .04 taper nickel-titanium rotary files (Dentsply, USA) and obturation was done utilizing gutta percha and Roth's 801 sealer (Roth Drug Co., Chicago, IL). Post space was immediately prepared to a length of 9 mm. Posts (Para Post XT, Coltene, USA, Spira post standard and Taper, AMG America, USA, DentFlex Fiber, Brasseler USA, Carbon Post, Brasseler, USA and gold cast post, Heraeus, USA) were luted using RelyXTM cement following manufacturer's instruction. Teeth were mounted and loaded in testing machine (Instron® testing machine, Canton, Massachusetts, USA). Collected data were analyzed using ANOVA with a Tukey HSD post hoc test. Result: There was a statistical significantly difference between the mean retention strengths of C-post and the other five post systems (p<0.0001). There were no statistically significant differences in retention strengths between Para post, both Spira posts, Fiber posts, and gold cast post (p>0.05). Conclusion: The high retention value of carbon post with resin cement were also reported on other in vitro studies.