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Influence of Light Curing Method and Curing Time on the Surface Hardness and Degree of Cure in Composite Resins | ||
| Journal of University of Babylon | ||
| Article 1, Volume 20, Issue 2, 2012, Pages 778-795 | ||
| Author | ||
| di Shirshab Thiab | ||
| Abstract | ||
| The aim of study was to determine the surface hardness(SH) and the degree of cure (DgOC) of light-activated composite polymerized with a halogen(HLCU) and LED (LED LCU)light cure units with different curing intervals.100 samples were prepared that divided into 10 groups of 10 samples for each group using a tube-like stainless steel mold utilizing two composite materials (SwissTEC and Tetric®Ceram), shade A l cured for 20, 40 and 60 seconds with HLCU, 5,10 seconds with LED LCU type . The cured samples with 2 mm thickness removed from the mold and the hardness were measured with Vickers test for the exposure (top) and the inner (bottom) sides . 2-way ANOVA (at p ≥ 0.05) followed by Duncan multiple range test .the results showed that DgOC with LED was high significantly more than that for halogen .The conclusions of this study , that all materials, and cuing times passed the ISO 2000/4049 requirements, the hardness of the exposure (top) and the inner (bottom) sides was higher for the samples cured with halogen than that cured with LED and also was more with SwissTec than the samples of Tetric®Ceram. | ||
| Keywords | ||
| Key Words; DgOC surface hardness; light cure; composite; Curing time | ||
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