Abstract:

Purpose: The purpose of this study is to study the impact of the increase in thickness on microserity in bulk-fill composites polymed with three different light devices.  Tools and Methods: Two different bulk-fill composites (Tetric Evo Ceram Bulk Fill, X-trafil) and a single liquid bulk-fill composite (SDR) were used. The compounds were placed in a diameter of 5 mm at a depth of 1mm, in four metal patterns, and polymed with two different LED light devices (Blue Phase and Valo) and one halogen light device (Hilux). Examples were kept 24 hours at 37°C at a 100% moist environment. Vickers hardness measurements were made by applying 100 gr strength in 5 seconds. Three measurements were made from both the top and the bottom. The results were analyzed at a statistical level of 0.05. Results:X-tra fill, polymerized with all light devices on the top and bottom surfaces, showed high hardness values in a remarkable level compared to other groups (p<0.05). The difference in light devices other than SDR has not changed the hardness of composite groups (p>0.05). Only SDR has shown lower certificate values than other light devices when polymerized with the Blue Phase (p<0.05). When the relationship between composite layers and hardness was studied, a distinct level of hardness difference was observed in the 1 and 4 mm of Tetric Evo Ceram and X-trafill composites polymerized with halogen (p<0.05). Difference has not been found in SDR composite samples polymed with halogen (p>0.05). Results: The hardness of the composites varies depending on material, light device and depth Key words: composite resin, dental light devices, hardness test

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