Effect of active application of self-etching ceramic primer on the long-term bond strength of different dental CAD/CAM materials

Abstract

Background The objective of this in vitro study was to evaluate the effect of the active application of self-etching ceramic primer (ME&P) on the bond strength of different dental CAD/CAM materials (Lithium Disilicate ceramic (LD), Leucite ceramic (LE), Zirconia reinforced lithium silicate ceramic (ZLS), and Hybrid ceramic (HC)) with thermocycling aging. Material and Methods The samples were randomly divided into 16 groups (n = 20). Dual resin cement cylinders were made and light cured for 10 s (1.200 mW/cm2) for the shear bond strength test. 3-way ANOVA revealed that the factors were statistically significant ( P < 0.05). Results The aging process had a negative impact on the bond strength for all groups except for Lithium Disilicate, with active application. ZLS and LE showed promising results with high bond strength values for the ME&P active application; however, after aging the bond strength value was significantly reduced. HC showed reduced bond strength values regardless the ME&P application. Conclusions In order to obtain a durable bond strength, the recommended protocol of 20 s of active application followed by 40 s of sitting time in the self-etching ceramic primer should be followed when using reinforced-glass ceramics as restorative materials. Key words: Dentistry, dental materials, silane, shear strength, computer-aided design

Effect of Surface Treatment and Resin Cement on the Bond Strength of an Advanced Lithium Disilicate

“…Therefore, further studies considering aging protocols are strongly advocated to investigate the bond strength in long-term behavior. 34 35 36 In addition, as an in vitro study, this research did not consider all the factors present in the oral medium, such as fatigue 37 and pH variation. Clinical studies are also suggested to corroborate or contradict the present findings.…”