The effect of diode laser on the shear bond strength of one step self adhesive systems to human dentin: An in vitro study

Adhesives are integral to modern restorative dentistry for enhanced functional and esthetic outcomes. The use of lasers for improved bonding is on the rise and there is a need to understand the effect of lasers on adhesives. The study aims to evaluate the effect of diode laser irradiation on one-step self-etch adhesive before their polymerization on the shear bond strength between resin cement and dentin. Thirty extracted human teeth were collected and the buccal surface was grounded till dentin was exposed. A window of 3mm x 3mm was made on all the specimens that served as test sites and were randomly allocated to three groups (n = 10); Group 1: G-Premio bond without laser irradiation followed by photopolymerization; Group 2: G-Premio bond with laser irradiation without photopolymerization, and Group 3: G-Premio bond with laser irradiation followed by photopolymerization. The Shear Bond Strength (SBS) was determined using a Universal Testing Machine. One-way ANOVA followed by post hoc Tukey test was used with a level of significance at P ≤ 0.05. SBS was significantly highest among Group 3 followed by Group 1 and the least SBS was found in Group 2 (P < 0.001). A post hoc test revealed significant differences between all three groups (P < 0.001). G-Premio bond irradiated with a diode laser followed by photo-polymerization exhibited the highest SBS.