Thakur Veerandar Singh1, Jaya Prakash Patil2, Rvs Chakradhar Raju3, Bhuvan Shome Venigalla4, S V Jyotsna1, Neha Bhutani1. 1. Senior Lecturer, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India . 2. Professor and Head, Department of Conservative Dentistry and Endodontics, PMNM Dental College , Bagalkot, India . 3. Professor and Head, Department of Conservative Dentistry and Endodontics, Sri Balaji Dental College , Moinabad, India . 4. Professor and Head, Department of Conservative Dentistry and Endodontics, Sri Sai College of Dental Surgery , Vikarabad, India .
Abstract
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 manufacturer'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.
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 manufacturer'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.
Authors: J David Eick; Shiva P Kotha; Cecil C Chappelow; Kathleen V Kilway; Gregory J Giese; Alan G Glaros; Charles S Pinzino Journal: Dent Mater Date: 2006-11-09 Impact factor: 5.304