Retention of Quartz-Fibre Endodontic Posts with a Self-Adhesive Dual Cure Resin Cement

This study examines retention of a quartz-fibre endodontic post cemented in extracted human teeth using two cement types. Fifty-four extracted human central incisor teeth were prepared for a tapered quartzfibre post. Posts were cemented in 28 teeth using conventional resin cement (RelyX ARC™), and 26 teeth using self-adhesive resin cement (RelyX Unicem™). Posts were cyclically-loaded. Bond strengths were tested and dependability assessment was carried out. Although there was no significant difference in Weibull modulus between groups (p < 0.05), greater dependability was displayed by RelyX Unicem™ group. Easy application and greater dependability of self-adhesive cement may improve bonding of fibre-based posts in root canals. KEY WORDS: Dental resin cement, In-vitro testing, Post retention, Quartz-fiber post