Characterization of N'Durance: a nanohybrid composite based on new nano-dimer technology

High molecular weight dimethacrylate systems within composite resins present a number of clinical deficiencies, including insufficient monomer conversion, polymerization shrinkage, and polymerization stresses. This study aimed to determine physical and chemical properties of a new high monomer conve...

Full description

Saved in:
Bibliographic Details
Published inCompendium of continuing education in dentistry (Jamesburg, N.J. : 1995) Vol. 31 Spec No 2; p. 5
Main Authors Bracho-Troconis, Cora, Trujillo-Lemon, Marianlela, Boulden, Jordan, Wong, Nicolas, Wall, Kristin, Esquibel, Kristina
Format Magazine Article
LanguageEnglish
Published United States 01.05.2010
Subjects
Absorption
Adsorption
Bisphenol A-Glycidyl Methacrylate - chemistry
Chemical Phenomena
Composite Resins - chemistry
Compressive Strength
Dental Materials - chemistry
Elastic Modulus
Humans
Materials Testing
Molecular Weight
Nanocomposites - chemistry
Photochemical Processes
Pliability
Polyethylene Glycols - chemistry
Polymers - chemistry
Polymethacrylic Acids - chemistry
Solubility
Stress, Mechanical
Surface Properties
Tensile Strength
Water - chemistry
Online AccessGet more information

Cover

More Information
Summary:High molecular weight dimethacrylate systems within composite resins present a number of clinical deficiencies, including insufficient monomer conversion, polymerization shrinkage, and polymerization stresses. This study aimed to determine physical and chemical properties of a new high monomer conversion nanohybrid composite resin based on nano-dimer technology (N'Durance), compared to other principal products on the market. Specimens were polymerized using a visible light lamp following the manufacturers' instructions. Compressive and flexural strengths, flexural modulus, water sorption, and tensile strength were determined. Water absorption and solubility were measured. Monomer conversion, polymerization shrinkage, and polymerization stress were calculated. It was shown that products using conventional resin (Bis-GMA/TEGDMA) have an average conversion of 60% for the microhybrids and 50% for the nanofilled composites. The shrinkage stress and contraction with N'Durance are lower than most commercial products: shrinkage contraction was reduced from 2.3% (average of the regular composite) to 1.5%, and the shrinkage stress from 2.5% to 1.1%, with an increase of approximately 27% in the monomer conversion. For products that use conventional resin, volumetric shrinkage increases when the final double bond conversion is increased to reduce the unreacted monomers; however, N'Durance shows high conversion and low polymerization shrinkage.
ISSN:1548-8578