Influence of cement type on the fracture resistance of resin nanoceramic crowns over knife-edge margins: A pilot study

Objective: To evaluate the influence of type cement on fracture resistance full-contour resin nanoceramic crowns cemented over preparations with knife-edge margins. Methods: A right lower premolar typodont model was prepared a 1.5-mm axial reduction, 2.0-mm occlusal and vertical margin. An anatomical crown designed from digital scanning preparation using CAD/CAM software. Then, 20 were milled blocks (Cerasmart270™) as well replica dental in cobalt-chrome alloy. The randomly divided into two groups. Group 1 self-adhesive (G-CEM LinkAce™) group 2 resin-modified glass ionomer (FujiCEM™ 2). Subsequently, they subjected to loading test an Instron universal testing machine until occurred. data statistically analyzed parametric Student’s t-test (α=0.05). Results: shown have significant effect crowns’ (p <0.001). presented mean 1284.3±340.19 Newtons, much higher than recorded 2, 417.9±106.35 increase 207.3% after luting. Conclusions: Resin showed considerably those cement.