Effects of solvent drying time on micro-shear bond strength and mechanical properties of two self-etching adhesive systems

Alireza Sadr, Yasushi Shimada, Junji Tagami

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Objectives: The all-in-one adhesives are simplified forms of two-step self-etching adhesive systems that must be air dried to remove solvent and water before curing. It was investigated whether those two systems perform equally well and if their performance is affected by air-drying of the solvent containing agent. Methods: Two adhesive systems (both by Kuraray Medical) were evaluated; Clearfil Tri-S bond (TS) and Clearfil SE bond (SE). Micro-shear bond strengths to human dentin after solvent air-drying times of 2, 5 or 10 s for each group were measured (n = 10). The indentation creep and hardness of the bonding layer were also determined for each group. Results: The lowest micro-shear bond strength, nano-indentation hardness and creep stress exponents were obtained for 2 s air dried specimens of each material. After 10 s air blowing, SE showed superior properties compared to TS groups (p < 0.05). Significance: When properly handled, two step self-etching material performs better than the all-in-one adhesive. Air-drying is a crucial step in the application of solvent containing adhesives and may affect the overall clinical performance of them, through changes in the bond strength and altering nano-scale mechanical properties.

Original languageEnglish
Pages (from-to)1114-1119
Number of pages6
JournalDental Materials
Volume23
Issue number9
DOIs
Publication statusPublished - Sep 1 2007
Externally publishedYes

Keywords

  • Air-drying
  • All-in-one
  • Bond strength
  • Creep
  • Hardness
  • Micro-shear
  • Nano-indentation
  • Primer
  • Self-etching
  • Solvent
  • Water

ASJC Scopus subject areas

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

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