Effect of Incisal Porcelain Veneering Thickness on the Fracture Resistance of CAD/CAM Zirconia All-Ceramic Anterior Crowns

Figure 12

Specimens subjected to cyclic load. A, motor drive connected to an oval-shaped acrylic block with a metal rod; B, the metal arm fixed to the base of the machine from the one end and the other end carrying a metal block 49 N; C, four custom-made copper molds, carrying the specimens; D, four metal stylus, each one ended with 7 mm × 2 mm diameter beveled metal rod.