Temperature changes influenced by different types of light curing units during polymerization of resin-based dental composite materials
Journal Title: Archives of Materials Science and Engineering - Year 2016, Vol 79, Issue 2
Abstract
Purpose: of this study was to evaluate the influence of LCU type on temperature changesduring polymerization of two resin-based composites with different matrices (silorane-basedand methacrylate-based).Design/methodology/approach: The light-curing units (LCUs) selected for this study includedthree various LEDs (LED 55, LED 10W and Radii Plus) and a QTH (Elipar Highlight). Two differentresin-based composites (RBCs) were used in this study. The silorane-based composite FiltekSilorane and methacrylate-based composite Filtek P60. Temperature changes were measuredduring polymerization with LCUs working in various curing modes. Empty mold, Filtek SiloraneRBC and Filtek P60 RBC were cured from a distance of 0 mm, 2.5 mm and 5 mm.Findings: Regardless the type of RBC, every time the highest temperature was reached withLED 55 light-curing unit. Comparing Filtek Silorane and Filtek P60 RBCs, the temperatureof Filtek Silorane RBC was significantly higher with LED 55 (35.4±4.9), Radii Plus (33.5±5.5)and Elipar Highlight LCUs (31.2±3.1), and significantly lower with LED 10W LCU (28.5±7.5).For Filtek P60 the measured temperatures of polymerization were 32.7±3.2 for LED 55 LCU,29.9±5.6 for LED 10W LCU, 31.0±2.4 for RadiiPlus LCU and 30.2±1.8 for Elipar Highlight LCU.Research limitations/implications: The research was carried out for two groups ofcomposite materials used for teeth restoration in modern dentistry. The experiment should berepeated on a broader group of resin-based composite dental materials and should take intoaccount more light-curing units. The study could be also done in situ on a real tooth model.Practical implications: This research gives an insight into the range of temperaturesthat are generated during polymerization process of dental composite materials. The resultsof the study are of a great value during choosing the restorative composite material forparticular application in the oral cavity, selecting the right light-curing-unit and adjusting thecuring parametersOriginality/value: The results of the study allow to conclude that the temperature valuesvary for each resin-based material, according to light-curing-unit type and the distance ofcuring seemed to have least influence on temperature changes during polymerization.
Authors and Affiliations
P. Malara, W. Świderski, J. Świderska
Keywords
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- EP ID EP189793
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