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The no prep technique to ceramic veneer have some advantages, one of the most important is the preservation of tooth structure. Purpose: Evaluate fracture resistance in bovine teeth, of ceramic veneer in different thickness (0,3 to 1,0mm). Methods: 60 teeth were selected for this study. Forty fifth ceramic veneer were made for each tooth, variating the thickness in: G1 -0,7mm; G2 -0,5mm; G3 -0,3mm and G4 -1,0mm (control group).Flexural strength test was carried out after 24h of luting. The results were analysed by ANOVA and HSD of Tukey. Results: the results showed that was no statistic difference between the groups (G1-297.2200; G2 -294.5467; G3 -291.9380 and G4 -290.0733). Conclusion: The ceramic veneer thickness didn't have influence in the final flexural strength.

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