Ismatullaev, ArturTasin, SimgeUsumez, Aslihan2024-05-252024-05-25202140268-89211435-604X10.1007/s10103-020-03103-12-s2.0-85088285335https://doi.org/10.1007/s10103-020-03103-1https://hdl.handle.net/20.500.14517/2134İsmatullaev, Artur/0000-0002-0119-6821; Ismatullaev, Artur/0000-0002-0119-6821; taşın, simge/0000-0002-0483-2520;The purpose of this study was to investigate the shear bond strength (SBS) of ceramic discs luted to differently etched enamel and dentin surfaces. Occlusal surfaces of 64 carious-free human molars and vestibule surfaces of 64 first maxillary incisors were ground to get flat superficial dentin and flattened enamel respectively. After generating 4 groups according to the surface etching method (37% orthophosphoric acid, Er:YAG laser-contact handpiece/scanning handpiece (1 or 2 times of scanning)), ceramic discs were luted to the surfaces with adhesive resin cement (Variolink N, Vivadent Ets., Schaan/Liechtenstein). After etching and cementation, thermocycling of 5000 cycles (Sd Mechatronik Gmbh, Feldkirchen-Westerham, Germany) and SBS test (Servopulser EHFFD1; Shimadzu, Kyoto, Japan) were performed respectively. The surface morphologies of 2 specimens, etched enamel and dentin, prepared for each group were examined with SEM analysis. Failure modes were determined under a USB digital microscope. Data were analyzed with one-way analysis of variance (ANOVA) and Tukey HSD test (alpha = 0.05). SBS values in dentin surfaces showed statistically significant differences (p < 0.05) among tested groups. The highest SBS among dentin groups was determined in the group which had 2 times etching by Er:YAG laser (11.42 MPa) by a scanning handpiece. No statistical differences were observed in the other dentin or enamel groups. Laser etching seems to be a viable alternative to acid etching on both enamel and dentin surfaces while double etching of dentin with a scanning handpiece can improve the adhesion.eninfo:eu-repo/semantics/closedAccessErYAG laserShear bond strengthIPS e-max Press ceramicSurface treatmentEnamelDentinArticleQ2Q1362447454WOS:00055102240000132696424