Effect of Different Surface Treatment Methods on Micro-Shear Bond Strength of CAD-CAM Restorative Materials to Resin Cement

• Published in: Journal of adhesion science and technology Vol. 33; no. 2; pp. 110 - 123
• Main Authors: Cengiz-Yanardag, Esra, Kurtulmus Yilmaz, Sevcan, Karakaya, Izgen, Ongun, Salim
• Format: Journal Article
• Language: English
• Published: Utrecht Taylor & Francis 17.01.2019; Taylor & Francis Ltd
• Subjects: Bond strength; Bonding strength; CAD-CAM; CAM; Computer aided manufacturing; Cr:YSGG laser; Emission analysis; Energy levels; Field emission microscopy; Hydrofluoric acid; Laser applications; Lasers; Lava; micro-shear bond strength; Sandblasting; SEM; surface roughness; Surface treatment
• ISSN: 0169-4243; 1568-5616
• DOI: 10.1080/01694243.2018.1514992

This study aimed to investigate the micro-shear bond strength (μSBS) of surface treated CAD-CAM materials to resin cement. The specimens obtained from IPS e.max CAD, Lava Ultimate, Cerasmart and Vita Enamic were divided according to the surface treatment method applied as: no treatment, 3W and 2W Er, Cr:YSGG laser irradiation, sandblasting and 5% hydrofluoric acid (HF) application. Then, μSBS and field emission-scanning electron microscope analysis were performed. Data were analyzed using the Mann Whitney U and the Kruskal Wallis tests. For all materials, the highest μSBS values were demonstrated in HF acid applied groups. Regarding the μSBS values of IPS e.max CAD, no significant differences were found among control, 2W Er, Cr:YSGG laser and sandblasting groups (p > 0.05). For Cerasmart and Lava Ultimate; 2W Er, Cr:YSGG laser treated group showed significantly lowest μSBS values while there was no significant difference among control, 3W Er, Cr:YSGG and sandblasting groups. HF applied Lava Ultimate and IPS e.max CAD groups exhibited the highest μSBS values among all the groups. For Vita Enamic; significantly lowest μSBS values were obtained in sandblasting group, whereas there was no significant difference among control, 3W Er, Cr:YSGG and 2W Er, Cr:YSGG groups (p > 0.05). The FE-SEM images of all CAD-CAM materials submitted to surface treatment revealed an increase in surface alterations compared to control groups. It can be concluded that prior to bonding 5% HF acid treatment is the best surface treatment method regarding the bond strength for all CAD-CAM restorative materials. Er, Cr:YSGG laser application with energy level of 3W can be recommended for IPS e.max CAD.