CO₂ laser dentin surface treatment most effectively increased ceramic shear bond strength

抄録

Background and aims: The purpose of this study is to determine the effect of CO₂ laser irradiation in comparison with sandblasting (Sb), hydrofluoric acid (Hf) and silane coupling agent (Si) on shear bond strength (SBS) of resin cement to CAD/CAM ceramics bonded to dentin.
Material and Methods: Forty-eight (CAD/CAM) ceramic discs were prepared and grouped by material, i.e. lithium disilicate (Emax CAD) and zirconia ceramic (Emax ZirCAD), distributed into four different groups: group A, lithium disilicate (Li) CO₂/HF/Si; group B, Li: HF/Si; group C, zirconia (Zr) CO₂/Sb/Si; group D, Zr: Sb/Si.
Results: It was shown significant difference between irradiated and non-irradiated groups in terms of shear bond strength for zirconia ceramics (p value = 0.039).
Conclusion: CO₂ laser irradiation increases shear bond strength for both CAD/CAM ceramics bonded to dentin.