The effect of thermal aging on flexural strength of CAD/CAM hybrid and polymeric materials

Abstract The field of dentistry is consistently innovating with the introduction novel hybrid and polymer materials for computer-aided design manufacturing (CAD/CAM). It noteworthy that temperature within oral cavity has a significant impact on strength new biomaterials utilized CAD/CAM fabrication fixed partial dentures (FPDs). Studies have demonstrated alterations in intraoral may significantly affect longevity durability dental restorative materials. This study aimed to evaluate flexural strength, modulus, effect thermal aging Five were investigated: nano-ceramic-hybrid (GR), polymer-infiltrated-ceramic-network (VE), polyether-ether-ketone (PK), fiberglass-reinforced epoxy-resin (CT), Feldspar Ceramic (VB). A total 100 bar-shaped specimens prepared (N = 20). Each group was subdivided into thermocycling (TC) no-thermocycling (NTC) subgroups (n 10). All underwent 3-point bending test. mean strengths moduli statistically analyzed using paired t-test, analysis variance (ANOVA), Bonferroni pair-wise comparison (p < 0.05). Significant differences observed (FS) modulus (E) between 0.001). GR had highest FS among tested NTC CT (924.88 ± 120.1 MPa), followed by (385.13 90.73 then PK (309.56 46.84 MPa). brittle ceramic VB lowest 0.001), but similar PICN VE. Only resin-containing VE decreased E after 0.01, p 0.013), showing softening their resin matrix. can be concluded (GR) higher than feldspar other resin/polymeric Polymeric PEEK resistant deleterious effects TC. Therefore, they would appropriate situations stress load.