Influence of increment thickness on radiant energy and microhardness of bulk-fill resin composites
Articles > Article · 2018
Authors: GAMZE KARAÇOLAK, Lezize Şebnem TÜRKÜN, Hayal BOYACIOĞLU, Jack L. FERRACANE
DENTAL MATERIALS JOURNAL, Journal Indexed in SCI Expanded, International, 2018, vol 37, pp 206-213
DOI: 10.4012/dmj.2017-032
Summary
Determining the energy transferred at the bottom of eleven bulk-fill resin composites, comparing top and bottom microhardness's and evaluating the correlation between microhardness and radiant energy were aimed. Samples were placed over the bottom sensor of a visible light transmission spectrophotometer and polymerized for 20 s. The bottom and top Knoop microhardness were measured. Paired t-test and correlation analysis were used for statistics (p <= 0.05). In all groups, the bottom radiant energy decreased significantly with increasing thickness. For groups of Aura 2 mm, X-tra Fil 2 and 4 mm, SDR 2 and 4 mm, X-tra Base 2 mm no significant difference was found between top and bottom microhardness. For the bottom levels of Aura, X-tra Fil, Filtek Bulk-Fill Posterior, SDR, X-tra Base groups no significant difference was found between the microhardness's of 2 and 4 mm thicknesses. For X-tra Fil, Tetric Evo Ceram Bulk-Fill, Filtek Bulk-Fill Flowable and Z100 groups radiant energy affected positively the microhardness.