Mechanical performance of novel bioactive glass containing dental restorative composites

D. Khvostenko, J. C. Mitchell, Thomas (Tom) Hilton, Jack Ferracane, J. J. Kruzic

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Objectives Bioactive glass (BAG) is known to possess antimicrobial properties and release ions needed for remineralization of tooth tissue, and therefore may be a strategic additive for dental restorative materials. The objective of this study was to develop BAG containing dental restorative composites with adequate mechanical properties comparable to successful commercially available composites, and to confirm the stability of these materials when exposed to a biologically challenging environment. Methods Composites with 72 wt% total filler content were prepared while substituting 0-15% of the filler with ground BAG. Flexural strength, fracture toughness, and fatigue crack growth tests were performed after several different soaking treatments: 24 h in DI water (all experiments), two months in brain-heart infusion (BHI) media + Streptococcus mutans bacteria (all experiments) and two months in BHI media (only for flexural strength). Mechanical properties of new BAG composites were compared along with the commercial composite Heliomolar by two-way ANOVA and Tukey's multiple comparison test (p ≤ 0.05). Results Flexural strength, fracture toughness, and fatigue crack growth resistance for the BAG containing composites were unaffected by increasing BAG content up to 15% and were superior to Heliomolar after all post cure treatments. The flexural strength of the BAG composites was unaffected by two months exposure to aqueous media and a bacterial challenge, while some decreases in fracture toughness and fatigue resistance were observed. The favorable mechanical properties compared to Heliomolar were attributed to higher filler content and a microstructure morphology that better promoted the toughening mechanisms of crack deflection and bridging. Significance Overall, the BAG containing composites developed in this study demonstrated adequate and stable mechanical properties relative to three successful commercial composites.

Original languageEnglish (US)
Pages (from-to)1139-1148
Number of pages10
JournalDental Materials
Volume29
Issue number11
DOIs
StatePublished - Nov 2013

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Dental composites
Bioactive glass
Glass
Tooth
Composite materials
Bending strength
Stress Fractures
Fillers
Fracture toughness
Mechanical properties
Fatigue crack propagation
Tooth Remineralization
Brain
Dental materials
Dental Materials
Streptococcus mutans
Toughening
Growth
Analysis of variance (ANOVA)
Bacteria

Keywords

  • Bacteria
  • Bioactive glass
  • Fatigue
  • Fracture toughness
  • Hydration
  • Resin composite
  • Strength

ASJC Scopus subject areas

  • Dentistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Medicine(all)

Cite this

Mechanical performance of novel bioactive glass containing dental restorative composites. / Khvostenko, D.; Mitchell, J. C.; Hilton, Thomas (Tom); Ferracane, Jack; Kruzic, J. J.

In: Dental Materials, Vol. 29, No. 11, 11.2013, p. 1139-1148.

Research output: Contribution to journalArticle

Khvostenko, D. ; Mitchell, J. C. ; Hilton, Thomas (Tom) ; Ferracane, Jack ; Kruzic, J. J. / Mechanical performance of novel bioactive glass containing dental restorative composites. In: Dental Materials. 2013 ; Vol. 29, No. 11. pp. 1139-1148.
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