Mechanical Properties of Five Esthetic Ceramic Materials Used for Monolithic Restorations: A Comparative In Vitro Study

Monolithic zirconia and hybrid ceramic restorations have been widely used in the last decade for both anterior posterior dental restorations. However, their use lacks sufficient scientific evidence most cases, as expeditious manufacturing of these versatile materials exceeds limits vitro and/or vivo validation. This study aimed to evaluate compare mechanical properties (flexural strength, fracture toughness, Vickers hardness, brittleness index) three CAD-CAM monolithic multilayer ceramics (GNX—Ceramill Zolid® Gen-X, ZCP—IPS e.max® ZirCAD, UPC—Upcera® Esthetic Explore Prime) one polymer-infiltrated (ENM—Vita® Enamic) with a lithium disilicate control (EMX —IPS CAD). A total 160 discs (GNX = 32, ZCP UPC ENM EMX 32) were cut, polished, fully sintered (except ENM). Half samples each group subjected hydrothermal aging. Descriptive analysis ANOVA tests groups. The groups showed significantly higher than non-aged aged (p < 0.05). lowest index, while highest. generally better those ceramic. All showed, some extent, change after aging, being affected.