Presurface Treatment of Zirconia and Lithium Disilicate Ceramics Conditioned With CO2 Laser, SECP, and Hydrofluoric Acid on Color Change, Surface Roughness, and Bond Failure: An In Vitro Analysis

Abstract

AIM: Shear bond strength (SBS), surface roughness (Ra), and color change (ΔE) of Lithium disilicate (LDC) and Zirconia (Zr) after pretreating with different surface conditioners i.e., Hydrofluoric acid (HF) and silane (S), self-etching ceramic primer (SECP) and carbon dioxide laser (CO2) laser. METHODS: A total of 120 discs, sixty from Group A: LDC and Group B: Zr were prepared. Each group was divided into 3 subgroups based on the method of conditioner (n =20) A1 and B1: HF(S), A2 and B2: SECP and A3 and B3: CO2 laser. Five discs from each Group A and B underwent ΔE evaluation. Five discs from each group after conditioning were assessed for Ra and 10 samples from each group were evaluated for SBS. ANOVA and Tukey’s post hoc test were used to compare the means and SD of SBS, Ra, and ΔE. RESULTS: The Highest ΔE was found in CO2 laser+LDC treated samples. The lowest ΔE was observed in HF(S)+Zr group. Samples pretreated with CO2 laser+LDC showed the maximum Ra and SBS. Conversely, discs conditioned with SECP+Zr exhibited minimum Ra. CONCLUSION: CO2 laser exhibited satisfactory outcomes on the bond integrity of resin cement to LDC and Zr. However, it should be used with caution because of the color change observed after its application.