One-year stability of resin-dentin bonds created with a hydrophobic ethanol-wet bonding technique

Fernanda T. Sadek, Carina S. Castellan, Roberto R. Braga, Sui Mai, Leo Tjäderhane, David Henry Pashley, Franklin Chi Meng Tay

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

Dentin bonding performed with hydrophobic resins using ethanol-wet bonding should be less susceptible to degradation but this hypothesis has never been validated. Objectives: This in vitro study evaluated stability of resin-dentin bonds created with an experimental three-step BisGMA/TEGDMA hydrophobic adhesive or a three-step hydrophilic adhesive after one year of accelerated aging in artificial saliva. Methods: Flat surfaces in mid-coronal dentin were obtained from 45 sound human molars and randomly divided into three groups (n = 15): an experimental three-step BisGMA/TEGDMA hydrophobic adhesive applied to ethanol (ethanol-wet bonding-GI) or water-saturated dentin (water-wet bonding-GII) and Adper Scotchbond Multi-Purpose [MP-GIII] applied, according to manufacturer instructions, to water-saturated dentin. Resin composite crowns were incrementally formed and light-cured to approximately 5 mm in height. Bonded specimens were stored in artificial saliva at 37 °C for 24 h and sectioned into sticks. They were subjected to microtensile bond test and TEM analysis immediately and after one year. Data were analyzed with two-way ANOVA and Tukey tests. Results: MP exhibited significant reduction in microtensile bond strength after aging (24 h: 40.6 ± 2.5a; one year: 27.5 ± 3.3b; in MPa). Hybrid layer degradation was evident in all specimens examined by TEM. The hydrophobic adhesive with ethanol-wet bonding preserved bond strength (24 h: 43.7 ± 7.4a; one year: 39.8 ± 2.7a) and hybrid layer integrity, with the latter demonstrating intact collagen fibrils and wide interfibrillar spaces. Significance: Coaxing hydrophobic resins into acid-etched dentin using ethanol-wet bonding preserves resin-dentin bond integrity without the adjunctive use of MMPs inhibitors and warrants further biocompatibility and patient safety's studies and clinical testing.

Original languageEnglish (US)
Pages (from-to)380-386
Number of pages7
JournalDental Materials
Volume26
Issue number4
DOIs
StatePublished - Apr 1 2010

Fingerprint

Dentin
Ethanol
Resins
Adhesives
Artificial Saliva
Water
Aging of materials
Transmission electron microscopy
Degradation
Matrix Metalloproteinase Inhibitors
Composite Resins
Bond strength (materials)
Analysis of variance (ANOVA)
Biocompatibility
Collagen
Patient Safety
Crowns
Acoustic waves
Analysis of Variance
Acids

Keywords

  • Degradation
  • Ethanol-wet bonding
  • Hybrid layer
  • Hydrophobic resin

ASJC Scopus subject areas

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

Cite this

One-year stability of resin-dentin bonds created with a hydrophobic ethanol-wet bonding technique. / Sadek, Fernanda T.; Castellan, Carina S.; Braga, Roberto R.; Mai, Sui; Tjäderhane, Leo; Pashley, David Henry; Tay, Franklin Chi Meng.

In: Dental Materials, Vol. 26, No. 4, 01.04.2010, p. 380-386.

Research output: Contribution to journalArticle

Sadek, FT, Castellan, CS, Braga, RR, Mai, S, Tjäderhane, L, Pashley, DH & Tay, FCM 2010, 'One-year stability of resin-dentin bonds created with a hydrophobic ethanol-wet bonding technique', Dental Materials, vol. 26, no. 4, pp. 380-386. https://doi.org/10.1016/j.dental.2009.12.009
Sadek, Fernanda T. ; Castellan, Carina S. ; Braga, Roberto R. ; Mai, Sui ; Tjäderhane, Leo ; Pashley, David Henry ; Tay, Franklin Chi Meng. / One-year stability of resin-dentin bonds created with a hydrophobic ethanol-wet bonding technique. In: Dental Materials. 2010 ; Vol. 26, No. 4. pp. 380-386.
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