Adaptation of Relined Fiber Post Using Discontinuous Short Fiber-Reinforced Resin Composite to Restore Weakened Endodontically-Treated Premolars

Abstract Objective This study aimed to investigate the effect of relining prefabricated fiber-reinforced composite (FRC) posts using bulk-fill, flowable, discontinuous short (SFRC) on intracanal adaptation in weakened endodontically-treated premolar teeth. Materials and Methods Forty extracted human teeth were selected randomly allocated five groups (n = 8) according canal preparation method restorative technique after endodontic treatment: Group 1 (control): nonflared, closed apex root canals; group 2, 4: flared, open-apex 3, 5: canals. Groups 3 restored with standard RelyX fiber post size #1, while 4 5 customized #1 relined bulk-fill flowable SFRC (everX Flow, GC, Tokyo, Japan). To evaluate adaptation, empty each sample corresponding (standard or customized) inserted was measured twice a micro-digital scale average value calculated. The then removed, followed by insertion light body polyvinyl siloxane (PVS) impression material into canal, reinsertion removal excess once PVS set. Finally, weight recorded, data analyzed one-way analysis variance Bonferroni hoc test (p-value 0.05). Results A statistically significant difference (p < 0.05) identified between groups. (control) had lightest material, (groups 5) 2 3). Conclusion Anatomically-customized provided better compared compromised