Abstract
Objective: To evaluate Translucency and Flexural strength of four ceramic materials Emax, Bruxizir, Katana and suprinity. using two thickness: 0.5 mm and 1mm.
Materials and Methods: Blocks of four CAD CAM esthetic restorative materials were used to prepare disks with the following dimensions: 10mm x 0.5mm and 10mm x 1mm for suprinity and emax & 12mm x 0.6mm and 12mm x 1.2mm for Bruxzir and katana. Then all the disks were crystallization and sintering. Then One Ceramic disc of each material were examined under spectrophotometer to determine the translucency for each disk. After that each disk was subjected to a biaxial flexural strength test. Results: For translucency test, at 0.5mm the highest value was found with Suprinity (21.71±1.59), Emax (17.89±3.47), then Bruxzir (13.27±1.86) while the lowest was found with Katana (11.57±2.45). while at 1mm the highest value was found with Emax (14.78±1.63), Suprinity (14.65±1.58), then Katana (10.59±2.16) while the lowest was found with Bruxzir (10.42±1.56). Otherwise for biaxial flexural strength, at 0.5 mm the highest value was found with bruxzir (194.04±59.50), followed by Katana (191.66±63.71), then suprinity (163.96±28.86), while the lowest value was found with Emax (113.70±26.76). while at 1mm the highest value was found with Katana (605.47±115.98), followed by Bruxzir (588.40±111.39), then Emax (474.62±68.36) while the lowest value was found with Suprinity (419.50±76.96). Conclusion: Increasing thickness affect the flexural strength of ceramic material positively, while it affects the translucency negatively except for katana. Different ceramic material exhibited variable translucency and flexural strength values depending on their composition.