Effects of resin formulation and nanofiller surface treatment on in vitro wear of experimental hybrid resin composite

L. Musanje, Jack Ferracane, L. L. Ferracane

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

While adding nonbonded nanofillers and lowering the viscosity of the resin matrix have shown success in reducing deleterious polymerization stresses in dental composites, their effects on wear resistance is unknown. This study evaluated abrasion and attrition wear of experimental composites with varied resin viscosities [inherent to varied ratios of TEGDMA: UDMA:bis-GMA (47:33:16 wt%; 30:33:33 wt%; 12:33:51 wt%)] and nanofiller surface treatment (12.6 wt% silanated or unsilanated silica: OX-50; 0.04 μm). Specimens (n = 6) were light cured, aged in water at 37°C for 7 days, and evaluated in the new OHSU oral wear simulator (100,000 cycles). Nonbonded nanofiller increased abrasion and attrition in the low and medium viscosity composites. Increase in resin viscosity increased abrasion and attrition in composites containing silanated nanofiller, with equivocal effects in composites containing unsilanated nanofiller. Nonbonded nanofiller can lower the overall wear resistance of some composite formulations. Increasing resin viscosity generally lowers the wear resistance, but had minimal effect on composites containing nonbonded nanofiller.

Original languageEnglish (US)
Pages (from-to)120-125
Number of pages6
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume77
Issue number1
DOIs
StatePublished - Apr 2006

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Composite Resins
Surface treatment
Resins
Wear of materials
Viscosity
Composite materials
Abrasion
Wear resistance
Bisphenol A-Glycidyl Methacrylate
Dental composites
Silicon Dioxide
Simulators
Silica
Polymerization
Water

Keywords

  • Composite
  • Nonbonded nanofiller
  • Viscosity
  • Wear

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

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abstract = "While adding nonbonded nanofillers and lowering the viscosity of the resin matrix have shown success in reducing deleterious polymerization stresses in dental composites, their effects on wear resistance is unknown. This study evaluated abrasion and attrition wear of experimental composites with varied resin viscosities [inherent to varied ratios of TEGDMA: UDMA:bis-GMA (47:33:16 wt{\%}; 30:33:33 wt{\%}; 12:33:51 wt{\%})] and nanofiller surface treatment (12.6 wt{\%} silanated or unsilanated silica: OX-50; 0.04 μm). Specimens (n = 6) were light cured, aged in water at 37°C for 7 days, and evaluated in the new OHSU oral wear simulator (100,000 cycles). Nonbonded nanofiller increased abrasion and attrition in the low and medium viscosity composites. Increase in resin viscosity increased abrasion and attrition in composites containing silanated nanofiller, with equivocal effects in composites containing unsilanated nanofiller. Nonbonded nanofiller can lower the overall wear resistance of some composite formulations. Increasing resin viscosity generally lowers the wear resistance, but had minimal effect on composites containing nonbonded nanofiller.",
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