en
Scientific article
Review
English

Influence of mechanical and chemical degradation on surface gloss of resin composite materials

Published inAmerican journal of dentistry, vol. 22, no. 5, p. 264-268
Publication date2009
Abstract

PURPOSE: To determine the changes in surface gloss of different composite materials after simulation of mechanical and chemical aging mechanisms. METHODS: 36 specimens were fabricated for each material and polished with 120-, 220-, 500-, 1200-, 2400- and 4000- grit SiC abrasive paper, respectively. Gloss measurements were made with a glossmeter (Novo-Curve) prior to testing procedures. Specimens of each material were randomly divided into three groups. Group 1 was conditioned for 7 days at 37 degrees C in 75% ethanol aqueous solution. Group 2 was immersed in fluoride gel (Elmex Gelee) at 37 degrees C for 1 hour. Group 3 was subjected to simulated toothbrushing with an electric toothbrush while being immersed in toothpaste. Surface gloss measurements were made subsequently. RESULTS: Significant difference between surface gloss of the composite materials tested were detected after simulated brushing (Kruskal Wallis, P < 0.05). With the exception of Filtek Silorane, all composite materials tested were significantly affected by immersion in Elmex Gelee (Wilcoxon signed-rank test, P < 0.05). Immersion in 75% alcohol aqueous solution significantly affected surface gloss except natural enamel and Durafill (Wilcoxon signed-rank test, P< 0.05).

Keywords
  • Carbon Compounds, Inorganic/chemistry
  • Cariostatic Agents/chemistry
  • Composite Resins/*chemistry
  • Dental Enamel/ultrastructure
  • Dental Materials/*chemistry
  • Dental Polishing/instrumentation/methods
  • Diamines/chemistry
  • Ethanol/chemistry
  • Fluorides/chemistry
  • Fluorides, Topical/chemistry
  • Humans
  • Light
  • Materials Testing
  • Optical Processes
  • Silicon Compounds/chemistry
  • Solvents/chemistry
  • Surface Properties
  • Temperature
  • Time Factors
  • Toothbrushing/instrumentation
  • Toothpastes/chemistry
Citation (ISO format)
ARDU, Stefano et al. Influence of mechanical and chemical degradation on surface gloss of resin composite materials. In: American journal of dentistry, 2009, vol. 22, n° 5, p. 264–268.
Identifiers
ISSN of the journal0894-8275
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