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Interfacial morphology and bond strength of self‐etching adhesives to primary dentin with or without acid etching
Author(s) -
BolañosCarmona Victoria,
GonzálezLópez Santiago,
De HaroMuñoz Cristina,
BrionesLuján María T.
Publication year - 2008
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.31135
Subject(s) - etching (microfabrication) , materials science , morphology (biology) , bond strength , composite material , adhesive , acid etching , dentin , layer (electronics) , genetics , biology
The aim of the study was to determine the interfacial morphology and bond strength of three current self‐etching adhesives (SEAs) to primary dentin and to evaluate the effect of introducing an additional step of phosphoric acid etching. Three human primary molars were assigned to each adhesive group for testing microtensile bond strength (μTBS) and three for studying interface morphology. Groups were: group 1, Excite, a total‐etch adhesive (control); group 2, Adhese (ASE); group 3, Adper‐Prompt‐L‐Pop (APLP), and group 4: Xeno III (XE) SEAs; groups 5–7 received application of 37% phosphoric acid for 15 s before applying ASE, APLP, and XE, respectively. A class I cavity was performed in each molar to study the interface morphology. Two halves of each tooth were used for examination either by optical microscopy, using Masson's trichromic dye technique, or by scanning electron microscopy. For μTBS determination, composite/dentin bars (1 mm 2 section) were obtained from each tooth, and tested in tension until debonding. The μTBS was significantly lower in the APLP than in the rest of the groups. The performance of SEAs on primary dentin depends on the product. Inclusion of dentin pre‐etching step did not significantly modify μTBS results. All SAEs achieved greater decalcification depth on etched versus nonetched dentin. © 2008 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2008