Peroxide-Free Bleaching Gel: Effect on the Surface and Mechanical Properties of Nano- and Micro-Hybrid Restorative Composite Materials

This laboratory investigation was designed to test the influence of a novel bleaching formulation based on phthalimidoperoxycaproic acid (PAP) with additives surface and mechanical properties nano- micro-hybrid restorative composites. Twenty-four bar-shaped twelve disk-shaped samples from each composite were prepared. The randomly divided into two groups according treatment, i.e., experimental control. treated went through process: by Opalescence Regular or PAP+-containing gel (HiSmile™). group underwent process for seven consecutive days (a 10-min session application every day) before tested. A paired sample t-test performed compare results between control groups. level significance set at 0.05. roughness nanohybrid using (p < 0.05) significant. Additionally, significant difference in nanohardness elastic modulus microhybrid observed: p = 0.041 0.023, respectively. While marked flexural strength observed Regular, Hismile™ caused diminutive insignificant reduction tested > 0.05). It found that affects bulk materials, whereas PAP+ has no deleterious effect either