This study investigated some mechanical properties of five CAD/CAM
materials used for the fabrication of provisional restorations and tooth
segments for digitally fabricated dentures. The CAD/CAM blocks were
sectioned into bars for flexural strength and elastic modulus testing
(n=80), and for surface microhardness (n=80). Half of the specimens were
water-stored for 30 days while the other half was dry-stored.
Additional specimens were prepared for bond strength (n=40). A 2-way
analysis of variance (ANOVA) was conducted to detect the effect of
material and water storage (α=0.05). Statistical software (IBM SPSS
Statistics v21; IBM) was used for conducting all analyses. Material type
and storage significantly affected the flexural strength, flexural
modulus and microhardness (p<0.001). The type of material did not
have a significant effect on bond strength (p>0.05). The tested
materials showed variation in their flexural properties and surface
microhardness whereas their bonding properties with resin luting cement
were similar.