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Repair Bond Strength and Surface Roughness of Zirconia Ceramics Treated via Carbon Dioxide Laser, Malachite Green, and Sandblasting. A Lab-Based Study

Eman M Alhamdan

Journal of Ceramic Science and Technology, Vol. 16, No. 2 (2025), pp. 85-92

DOI: 10.4416/JCST2024-00034

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Abstract

AIM Contemporary surface conditioners (carbon dioxide (CO2) laser at different power outputs and malachite green (MG) activated by low-level laser therapy (LLLT) on the surface roughness (Ra) and repair bond strength (RBS) of zirconia bonded to composite MATERIALS AND METHODS 104 discs were prepared from pre-sintered zirconia ceramic. The allocation of the samples was based on the surface conditioner: Group 1 (SB), Group 2 (CO2 laser-3 W), Group 3 (CO2 laser-4 W), and Group 4 (MG-LLLT). Ra analysis and surface topography were assessed using a profilometer and SEM. A ceramic repair kit and composite were applied as restorative materials on 20 samples from each cohort, which were allocated to two subgroups: A (without thermal aging) and B (with thermal aging). RBS and failure mode were assessed using a universal testing machine and stereomicroscope. Intergroup comparisons were performed using ANOVA and Tukey\'s post hoc test (p 

Keywords

Carbon dioxide laser, low-level laser therapy, surface roughness, repair bond strength, sandblasting.

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