A comparative evaluation of flexural strength of composite resins on glass fibre reinforcement

Aim: To evaluated the effects of glass fibre layering on the flexural strength of hybrid and microfill composites. Methodology: A stainless steel mold of dimension (25x2x2 mm) was used to fabricate a total of 90 speimens of corresponding dimensions according to the groups-control and experimental groups. A 3-point bending test was carried out to assess the flexural strength. Load was applied on the specimens by using a universal testing machine, at crosshead speed of 1 mm/min. The fracture load was recorded in kilo Newton which then converted to mega Pascal. RESULT- Stastitical analysis was performed by using analysis of variance (ANOVA) and student ‘t’ test. Glass fibre reinforcement improved the flexural properties of the composite resin significantly (p<0.001). Placement of a layer of glass fibre at the bottom of the specimens significantly (p<0.001) resists tensile failure as compared to the placement in the middle of the specimens. CONCLUSION- Glass fibre reinforcement of the hybrid and microfill composites improves the flexural properties of the composite resin materials significantly.