Comparison of Effect of C-Factor on Bond Strength to Human Dentin Using Different Composite Resin Materials ZC88-ZC91
Dr. Thakur Veerandar singh,
Senior Lecturer, Department of Conservative Dentistry and Endodontics,
Sri Sai College of Dental Surgery, Vikarabad, AP-501101, India.
E-mail : email@example.com
Background: The study was planned to assess the use of low shrinkage composites for restoring cavities with high configuration factor (C-factor) which are subjected to high stresses.
Aim: The aim of the study was to evaluate the effect of C- factor on tensile bond strength to human dentin using methacrylate based nanohybrid and low shrinkage silorane composite.
Materials and Methods: In this study 40 non carious human molar teeth were selected and assigned into two main groups - cavity (Class I cavity with high C-factor) and flat group (flat surface with low C-factor). Two different composite materials- methacrylate based and silorane low shrinkage composite were used to restore the teeth. Dentin surface was treated, adhesive application was done and composite was applied as per manufacturerâ€™s instructions. Samples were stored in distilled water then subjected to tensile bond strength measurement using universal testing machine.
Results: Statistical analysis was done using Independent sample t-test. The mean bond strength in methacrylate based and silorane composite was significantly higher in flat preparation (Low C-factor) than cavity preparation.The mean bond strength in both cavity (High C-factor) and flat preparation(Low C-factor) was significantly higher in silorane than in conventional methacrylate based composite.
Conclusion: The bond strength of composites to dentin is strongly influenced by C-factor and type of composite resin material used.