Fracture Resistance of New Fiber Post System (Rebilda GT)

Abstract

Background and Aims: Evaluate and compare the fracture resistance of endodontically treated teeth

restored with bundle glass fiber post and tapered glass fiber post, at 45 degree oblique load.

Materials and Method: Thirty newly extracted single rooted mandibular first premolars were chosen, and

after root canal preparation and obturation, post spaces were prepared. Then the samples were separated into

three groups (n = 10) dependent on the type of restorative method used: group A restored with Rebilda fiber

post [tapered glass fiber post], group B restored with Rebilda post GT post system (bundle glass fiber post),

and group C restored with direct composite resin restoration without a post (control). Using a universal

testing machine with speed of 0.5 mm/minute at 45 degree sloping load which was applied to the restored

teeth, fracture resistance was recorded in Newton.

Results: The results showed that the fracture resistance significantly affected by different post systems (p

< 0.05). The bundle glass fiber post (rebilda Gt) showed highest fracture resistance than the other groups.

Conclusion: Rebilda GT post (bundle glass fiber system) showed higher fracture resistance than the Rebilda

fiber post (tapered glass fiber post) and control group respectively