The evolution of contemporary nano-filled composite materials for dentistry clinical applications
Journal Title: INTERNATIONAL JOURNAL OF CURRENT RESEARCH IN MEDICAL SCIENCES - Year 2015, Vol 1, Issue 1
Abstract
Bulk-fill composites have emerged, possibly, as a new ‘‘class’’ of resin-based composites, which are claimed to enable restoration in thick layers, up to 4 mm. The most recent innovation in composite resin technology is the application of nanocomposite theories in restorative materials. Contemporary nanocomposite materials deliver increased aesthetics, strength, and durability, combining scientific principles for increased longevity. Direct applications of a nanocomposite resin materials will address the clinical applications of such a system in the anterior region. This study was to quantify and compare the mechanical properties of some present filling materials in particular two commercially available nanocomposite restorative materials. Z350 TM (Filtek™ Z350) and GrandioTM , were polymerized with a LED light for 20 seconds and subjected to mechanical tests. Properties are tested for Grandio exhibited significantly higher mean flexural strength values (f) compared to Z350 (89.1 MPa vs 61.9 MPa), that is significantly higher top microhardness values respect to Z350. Additionally, microhardness for the top surfaces of each composite were compared with their corresponding bottom surfaces, the bottom surfaces demonstrated significantly lower readings. Under optimal curing conditions, the physico-mechanical properties of most currently available bulk-fill composites to those of two conventional composite materials chosen as references, one highly filled and one flowable ‘‘nano-hybrid’’ composite. Tetric EvoCeram Bulk Fill (Ivoclar- Vivadent), Venus Bulk Fill (Heraeus-Kulzer), SDR (Dentsply), X-tra Fil (VOCO), X-tra Base (VOCO), Sonic Fill (Kerr), Filtek Bulk Fill (3M-Espe), Xenius (GC) were compared to the two reference materials. The materials were light-cured for 40 s in a 2 x 2 x 25 mm3 Teflon mould.
Authors and Affiliations
Daniz Kavei
Keywords
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