Comparative evaluation of shear bond strength of tooth colored restorative materials after exposure to 33% hydrogen peroxide- An in-vitro study Pasricha Shinam, Senior Lecturer, Kukreja Navneet, Professor, Bansal Abhishek, Reader Address for Correspondence: Dr. Shinam Pasricha, Senior Lecturer, Department of Conservative dentistry and Endodontics, National Dental College, Derabassi E-mail: endomypassion@yahoo.co.in
Online published on 25 November, 2013. Abstract Aim To determine the effect of hydrogen peroxide on tooth structure and to compare shear bond strength of composite, giomer and ormocer after exposure to 33% hydrogen peroxide. Materials and Method 60 intact human mandibular premolars were taken. The crowns of the teeth were sectioned longitudinally and exposed to 33% hydrogen peroxide solution. Samples were divided into three main groups A, B, C according to the restorative material (composite, giomer, ormocer) used. Cylinders of respective materials were bonded over samples. Each group was further divided into two subgroups A1, B1 and C1 and A2, B2 and C2 in which total-etch (Adper Single Bond 2, 3M ESPE,U.S.A) and Self-etch bonding agents (FL-Bond, Shofu Corporation, Japan) were used respectively. The shearbond strength was evaluated in universal testing machine by lowering a knife edge chisel at crosshead speed of 1mm/min. Statistical Analysis Statistical analysis was done using Kruskal-Wallis, Mann-Whitney and One way Anova. Results stated significant shear bond strength in total-etch than self-etch bonding agent. Total-etch ormocer showed the highest bond strength and self-etch composite reported the least. Conclusion In this study total-etch bonding agent resisted more shear forces than self etch.Ormocer proved to be the best material followed by giomer and composite. Top Keywords Shear bond strength, total-etch bonding agent, self-etch bonding agent, hydrogenperoxide, ormocer, giomer, composite. Top |