Influence of hydrostatic pulpal pressure on the microtensile bond strength of all-in-one self-etching adhesives

Keiichi Hosaka, Masatoshi Nakajima, Francesca Monticelli, Marcela Carrilho, Monica Yamauti, Juthatip Aksornmuang, Yoshihiro Nishitani, Franklin R. Tay, David H. Pashley, Junji Tagami

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Purpose: To evaluate the microtensile bond strength (μTBS) of two all-in-one self-etching adhesive systems and two self-etching adhesives with and without simulated hydrostatic pulpal pressure (PP). Materials and Methods: Flat coronal dentin surfaces of extracted human molars were prepared. Two all-in-one self-etching adhesive systems, One-Up Bond F (OBF; Tokuyama) and Clearfil S3 Bond (Tri-S, Kuraray Medical) and two self-etching primer adhesives, Clearfil Protect Bond (PB; Kuraray) and Clearfil SE Bond (SE; Kuraray) were applied to the dentin surfaces according to manufacturers' instructions under either a pulpal pressure (PP) of zero or 15 cm H 2O. A hybrid resin composite (Clearfil AP-X, Kuraray) was used for the coronal buildup. Specimens bonded under PP were stored in water at 37°C under 15 cm H2O for 24 h. Specimens not bonded under PP were stored under a PP of zero. After storage, the bonded specimens were sectioned into slabs that were trimmed to hourglass-shaped specimens, and were subjected to microtensile bond testing (μTBS). The bond strength data were statistically analyzed using two-way ANOVA and the Holm-Sidak method for multiple comparison tests (α = 0.05). The surface area percentage of different failure modes for each material was also statistically analyzed with three one-way ANOVAs and Tukey's multiple comparison tests. Results: The μTBS of OBF and Tri-S fell significantly under PP. However, in the PB and SE bonded specimens under PP, there were no significant differences compared with the control groups without PP. Conclusions: The μTBS of the two all-in-one adhesive systems decreased when PP was applied. However, the μTBS of both self-etching primer adhesives did not decrease under PP.

Original languageEnglish (US)
Pages (from-to)437-442
Number of pages6
JournalJournal of Adhesive Dentistry
Issue number5
StatePublished - 2007


  • All-in-one adhesives
  • Dentin
  • Microtensile bond strength
  • Pulpal pressure

ASJC Scopus subject areas

  • Orthodontics
  • Oral Surgery
  • Periodontics


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