• A K Culhaoglu, M A Kilicarslan, B Gokdeniz, and G Gur.
• Department of Prosthodontics, Faculty of Dentistry, Kırıkkale University, Kırıkkale, Turkey.
• Niger J Clin Pract. 2021 May 1; 24 (5): 705-711.

BackgroundUsing lasers for adhesive restoration removal can be practical and atraumatic.AimsThe purpose of this study was to investigate Er: YAG laser exposure on debonding the adhesive cementation between enamel and feldspar ceramic, lithium disilicate-reinforced and resin nano ceramic composite laminate restorations.Materials And MethodsVita Cerec Blocs, IPS e.max Computer-aided design (CAD). Computer-aided design and manufacturing (CAD-CAM) in full and Lava Ultimate restorative materials were chosen. The 3 × 3 mm2 standardized, 0.5-mm and 1 mm thick specimens were cemented on an enamel surface. After thermocycling, each material group was randomly divided into laser treated and control (non-laser treated) groups. Shear bond strength test was done with a universal testing machine with crosshead speed 0.5 mm/min. Factorial ANOVA Technique and TUKEY HSD multiple comparison test were used for statistical analyses. Moreover, the surface morphology of the debonded samples and the enamel was observed using a scanning electron microscope.ResultsThe laser application was found to weaken the SBS values significantly (P < 0.05) for all groups; however, the most dramatic SBS decrease was observed for laser treated IPS e.max at both thicknesses.ConclusionsLaser treatment can serve as a practical and effective method that eliminates the risk the enamel damage and restoration fracture.

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