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Two methods to simulate intrapulpal pressure: effects upon bonding performance of self‐etch adhesives
Author(s) -
Feitosa V. P.,
Gotti V. B.,
Grohmann C. V.,
Abuná G.,
CorrerSobrinho L.,
Sinhoreti M. A. C.,
Correr A. B.
Publication year - 2014
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/iej.12222
Subject(s) - adhesive , materials science , molar , bond strength , dentistry , composite material , significant difference , medicine , layer (electronics)
Aim To evaluate the effects of two methods to simulate physiological pulpal pressure on the dentine bonding performance of two all‐in‐one adhesives and a two‐step self‐etch silorane‐based adhesive by means of microtensile bond strength (μ TBS ) and nanoleakage surveys. Methodology The self‐etch adhesives [ G ‐ B ond P lus ( GB ), A dper E asy B ond ( EB ) and silorane adhesive ( SIL )] were applied to flat deep dentine surfaces from extracted human molars. The restorations were constructed using resin composites F iltek S ilorane or F iltek Z 350 (3 M ESPE ). After 24 h using the two methods of simulated pulpal pressure or no pulpal pressure (control groups), the bonded teeth were cut into specimens and submitted to μ TBS and silver uptake examination. Results were analysed with two‐way anova and T ukey's test ( P < 0.05). Results Both methods of simulated pulpal pressure led statistically similar μ TBS for all adhesives. No difference between control and pulpal pressure groups was found for SIL and GB . EB led significant drop ( P = 0.002) in bond strength under pulpal pressure. Silver impregnation was increased after both methods of simulated pulpal pressure for all adhesives, and it was similar between the simulated pulpal pressure methods. Conclusions The innovative method to simulate pulpal pressure behaved similarly to the classic one and could be used as an alternative. The HEMA ‐free one‐step and the two‐step self‐etch adhesives had acceptable resistance against pulpal pressure, unlike the HEMA ‐rich adhesive.