الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 106 |  |  |
| | | from | 106 | | |
Abstract
Aim: The aim of this study was to evaluate the effect of surface treatment and preparation design on fracture resistance of CAD/CAM monolithic zirconia laminate veneers. Materials and Methods: Two natural teeth prepared with 2 designs (L, C) and the corresponding two dies were used to fabricate twenty-eight fiber reinforced resin abutment (14 for each design). Twenty-eight laminate veneers milled from KATANA UTML to corresponding abutment. Each main group was subdivided into 2 equal subgroups (n=7) according to type of surface treatment (LS, LF, CS, CF). All veneers were cemented, thermocycled and universal testing machine was used to access fracture resistance. Results: Kruskal Wallis test showed no statistical difference in the median load was found among LS, LF, CS, and CF. Failure analysis of fractured laminates in this study showed mainly fracture of veneer restoration followed by veneer deponding. Conclusion: Preparation design and type of surface treatment didn’t influence fracture resistance.