Objective: The aim of this in vitro study was to evaluate the fracture resistance of endodontically treated premolar teeth restored with flowable short fiber-reinforced resin composite (SFFC) at varying depths within the root canals.
Methods: Fifty freshly extracted human single rooted premolars, were divided into 5 groups (n=10), group I (N) intact teeth, group II (P) restored coronally with resin composite only, group III, IV and V (SFFC2, SFFC4, SFFC6)based on post space preparation to a depth of 2, 4 and 6 mm respectively. Root canal treatment was done for all the samples of Group II, III, IV, V and the teeth were decoronated 2 mm above the cemento-enamel junction. Following decoronation post space preparation was done to the depths of 2mm, 4mm, 6mm (Group III, IV, V) respectively. Teeth were restored with SFFC (groups III-V)intra-radicularly and coronally sealed using resin composite. All the teeth were subjected to fracture strength test using Universal testing machine and mode of failure was analysed. Kruskal Wallis test followed by Dunn Post hoc test was conducted for statistical analysis.
Results: SFFC4 showed significantly (P<0.05) highest fracture resistance compared to intact teeth and the other experimental groups. All SFFC specimens showed higher fracture resistance than teeth restored with resin composite only.
Conclusion: Intra-radicular placement of SFFC, increased the fractured resistance significantly and may serve as a promising alternative to conventional post systems to rehabilitate endodontically treated teeth. (EEJ-2021-07-117)