Culhaoglu, A. K.Kilicarslan, M. K.Gokdeniz, B.Gur, G.2025-01-212025-01-2120211119-3077https://doi.org/10.4103/njcp.njcp_415_20https://hdl.handle.net/20.500.12587/25657Background: Using lasers for adhesive restoration removal can be practical and atraumatic. Aims: The 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 Methods: Vita 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 x 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. Results: The 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. Conclusions: Laser treatment can serve as a practical and effective method that eliminates the risk the enamel damage and restoration fracture.eninfo:eu-repo/semantics/closedAccessCeramic resin composite; Er; YAG laser; feldspar ceramic; laser crown debonding; lithium disilicate ceramicArticle24570571110.4103/njcp.njcp_415_202-s2.0-8510708230934018980Q2WOS:000657358400011Q4