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

Ahmed El Gamal; Etienne Medioni; Jean Paul Rocca; Carlo Fornaini; Nathalie Brulat-Bouchard

doi:10.5978/islsm.18-OR-05

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

Laser Ther. 2018 Mar 31;27(1):48-54. doi: 10.5978/islsm.18-OR-05.

Authors

Ahmed El Gamal¹, Etienne Medioni¹, Jean Paul Rocca¹, Carlo Fornaini¹, Nathalie Brulat-Bouchard²

Affiliations

¹ Micoralis laboratoy EA 7354, University Côte d'Azur, Nice, France.
² Mines ParisTech, Centre de Mise en Forme des Matériaux (CEMEF), CNRS-UMR 7635, Sophia Antipolis, France.

Abstract

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.

Keywords: CAD/CAM ceramics; CO2 laser; Dentin; Shear bond strength.