Light Emitting Diode in Comparison to Halogen Curing Technology: Microshear Bond Strength of Dental Composite Resin Restorative Material

The aim of this study was to compare the micro-shear bond strength of composite resin cured with halogen visible light and blue light emitting diode curing units. Flat enamel surfaces of 50 segments of teeth were prepared. 50 cylindrical composite resin specimens were bonded to the prepared teeth segments. Specimens were divided into 5 groups, three groups were cured for 10, 20 and 40 seconds using blue light emitting diode and 2 groups were cured for 20 and 40 seconds using halogen light. Specimens were submitted to micro-shear bond test at 1mm / min cross-head speed. Mean micro-shear bond strengths were analyzed by analysis of variance (One-way ANOVA) and Tukey's test at P