Compressive Strength in Roots with Fiber Quartz Post and Composites

Objectives: The aim this study was investigated to compression strength to different core materials with associated quartz posts to adhesive cemented. Methods: Forty roots incisors bovine teeth were distributed into four groups (n=10): G1- composite resin nanoparticles (Filtek Supreme, 3M-Espe); G2- microhybrid resin composite (Tetric Ceram, Ivoclar-Vivadent); G3: microhybrid dual resin composite (Biscore, Bisco); G4- Reforcore System (Ângelus). The bovine teeth were prepared and include in acrylic resin. The quartz posts was cemented with resin dual cement Duo Link (Bisco) and building core with an acetate matrix anterior prepared. All specimens were storage in distillated water in 370 for 24 hours and submitted a mechanical cycling to posterior compression strength 450 tests in a universal tests machine (EMIC DL 1000). Results: The data were subjected to statistical analysis that indicated medium values (Kgf): G1- 51,34; G2- 56,75; G3- 69,83 e G4- 49,90 and comparing Biscore and Tetric Ceram did not show significant influence. They showed the best values of the fracture strength compared with Filtek Supreme and Reforcore. Conclusion: It was concluded that in medium values, the best compressive strength result was obtained with dual composite resin microhybrid follow to composite resin microhybrid, Tetric Ceram, composite resin nanoparticulated, Filtek Supreme and Reforcore System.