Influence of Conventional Versus Digital Workflow on Marginal Fit and Fracture Resistance of Different Pressable Occlusal Veneers After Thermomechanical Fatigue Loading

Objectives: The aim of the study was to evaluate marginal fit and fracture resistance after thermomechanical fatigue two types glass ceramic occlusal veneers constructed using techniques for wax pattern. Methods: Thirty-two non-carious maxillary molars were used in this study. Teeth prepared receive all veneers. Prepared teeth randomly divided into equal groups according fabrication material veneer: Group I (e-max): pressable lithium disilicate ceramics. II (Celtra): zirconia-reinforced silicate Each group further subdivided subgroups technique construction pattern: Subgroup A (CAD/CAM): CAD/CAM technique. B (Conventional): Conventional Wax patterns sprued, invested heat pressed produce All cemented their corresponding adhesive resin cement. Thermomechanical aging performed on samples. Vertical gap distance measurement testing done. Results: results revealed that e.max (Conventional) recorded highest vertical mean values followed by Celtra then (CAD/CAM) while lowest values. It found (conventional) processed Conclusions: pattern presents a viable alternative option conventional Press promising results.