Direct Restorative Materials
Universal CATEGORY DESCRIPTION
Universal composite materials are those with sufficient esthetic characteristics for use in anterior restorations, and with sufficient strength for posterior restorations.
While the term “universal” is not new, there is still no clear definition of dental universal composites.
It is generally agreed upon that these all-purpose dental materials are those that:
• bond to all dental substrates with a single application;
• can be used with total-, self- and selective-etch techniques;
• can be used with any dual-, self- and light-cure materials without the need for a separate activator;
• can be used for both direct and indirect substrates.
Both hybrid and nanohybrid composites are marketed as universal. Hybrid composites are submicron-filled resin composites often administered via syringe. Theses light-cured materials offer reduced polymerization shrinkage, packability, easy sculpting, high bond strength, radiopacity and the esthetics of a ceramic with excellent polishability and several available shades and translucencies. Nanohybrids are nanofill composites containing nanometer particles combined with more conventional filler technology. The mechanical properties, compressive and diametral strengths, and fracture resistance of these materials are said to be equal to or higher than those of universal hybrids. Nanohybrids also have excellent esthetic qualities, with high polishability and a lifelike opacious translucency.
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