Effect of Surface Treatment and Core Material (IPS E.max Press) on the Fracture Resistance of Ceramic Materials

Background: Ceramics are biocompatible materials and can simulate the visual character of the tooth substance successfully. Zirconia crowns and lithium disilicate crowns, specifically Emax, are the most highly regarded types of dental crowns.The oral environment is influenced by the all-ceramic restoration system\'s bond strength. This investigation aimed to determine how surface treatment and core material (Emax- press) affect various ceramic materials' resistance to fracture. Methods Forty specimens constructed using the heat press method and E-max press material depending on their surface treatment, samples were divided into four groups at random;each group consists of ten samples.Control group:Untreated surface samples.Group sand plast (AL2O3) : aluminum oxide particles are used to sandblast samples.Group potassium hydrogen difluoride (KHF2) : potassium hydrogen difluoride-etched samples.Combination of Group E-max press: samples are etched with potassium hydrogen difluoride and sandblasted with aluminum oxide particles.Using a scanning electron microscope, the morphological change of the E-max press after surface treatment was observed.Every sample has 2mm veneering ceramic applied to it.A universal testing machine was used to measure fracture resistance.Results: According to data analysis, the (E-max Combination) group had the lowest mean fracture resistance values, while the (E-max sand blast) and (E-max etching) groups had the greatest mean values. Conclusion: Within the limitations of this study, the results suggest that, utilizing of various surface treatments with E-max press substructures were more effective on the values of fracture resistance.