Relationship between thin-film bond strength as measured by a scratch test, and indentation hardness for bonding agents

Shusuke Kusakabe, Henry R Rawls, Masato Hotta

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Objectives: To evaluate thin-film bond strength between a bonding agent and human dentin, using a scratch test, and the characteristics and accuracy of measurement. Methods: One-step bonding agents (BeautiBond; Bond Force; Adper Easy Bond; Clearfil tri-S Bond) and two-step bonding agents (Cleafil SE Bond; FL-Bond II) were investigated in this study. Flat dentin surfaces were prepared for extracted human molars. The dentin surfaces were ground and bonding agents were applied and light cured. The thin-film bond strength test of the specimens was evaluated by the critical load at which the coated bonding agent failed and dentin appeared. The scratch mark sections were then observed under a scanning electron microscope. Indentation hardness was evaluated by the variation in depth under an applied load of 10. gf. Data were compared by one-way ANOVA with the Scheffé's post hoc multiple comparison test (p 2 =0.31) was found between thin-film bond strength and indentation hardness. Significance: Thin-film bond strength test is a valid and reliable means of evaluating bond strength in the vicinity of the adhesive interface and is more accurate than other methods currently in use. Further, the thin-film bond strength is influenced by the hardness of the cued bonding agent.

Original languageEnglish (US)
JournalDental Materials
DOIs
StateAccepted/In press - May 1 2015

Keywords

  • Bonding agent
  • Indentation hardness
  • Scratch test
  • Thin-film bond strength

ASJC Scopus subject areas

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

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