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Type: Artigo de periódico
Title: Influence of hydrostatic pulpal pressure on the microtensile bond strength of all-in-one self-etching adhesives
Author: Hosaka, K
Nakajima, M
Monticelli, F
Carrilho, M
Yamauti, M
Aksornmuang, J
Nishitani, Y
Tayh, FR
Pashley, DH
Tagami, J
Abstract: Purpose: To evaluate the microtensile bond strength (mu TBS) 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 S-3 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(2)0. A hybrid resin composite (Clearfil AP-X, Kuraray) was used for the coronal buildup. Specimens bonded under PP were stored in water at 37 degrees C under 15 cm H20 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 (mu TBS). The bond strength data were statistically analyzed using two-way ANOVA and the Holm-Sidak method for multiple comparison tests (alpha = 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 mu TBS 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 mu TBS of the two all-in-one adhesive systems decreased when PP was applied. However, the mu TBS of both self-etching primer adhesives did not decrease under PR
Subject: dentin
pulpal pressure
all-in-one adhesives
microtensile bond strength
Country: EUA
Editor: Quintessence Publishing Co Inc
Citation: Journal Of Adhesive Dentistry. Quintessence Publishing Co Inc, v. 9, n. 5, n. 437, n. 442, 2007.
Rights: aberto
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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