Low-Level Laser Therapy of Er, Cr: YSGG and Femtosecond on Dentin Adhesion with Bioactive and Resin-Modified Glass Ionomer Cement

Abstract

Aim: This study examined the shear bond strength (SBS) and mode of failure of bioactive resin cement (BARC) and resin-modified glass ionomer cement (RMGIC) to dentin treated with Er, Cr: YSGG (ECrL) and femtosecond laser (FSL). Methods: 120 non-carious, non-fractured human molars without prior restorations were selected and processed. The teeth were grouped by surface conditioning. Groups 1 and 5 were untreated controls. Groups 2 and 6 had ECrL surface treatment, while Groups 3 and 7 had FSL. EDTA and Tetric N-Bond Universal conditioned Groups 4 and 8. Groups 1–4 (n = 15) employed BARC for bonding, while Groups 5–8 used RMGIC. A universal testing machine (UTM) tested shear bond strength, and a stereomicroscope studied the failure mode. Comparing findings required means, SDs, ANOVA, and Tukey’s post hoc test. Results: Group 1, without conditioning, has the lowest BARC-bonded SBS. In Group 4, EDTA+ Tetric N-Bond Universal-conditioned dentin bonded to BARC had the greatest SBS values. In the RMGIC-bonded groups, Group 5 without dentin conditioning had the lowest bond values, while EDTA+ Tetric NBond Universal-conditioned dentin had the greatest. Conclusion: EDTA and Tetric N-Bond Universal dentin conditioning improves RMGIC and BARC bond strength. This study’s conditioning methods boosted bond strength.