Selective dentin etching: A potential method to improve bonding effectiveness of universal adhesives
| Autor: | Mustafa Murat Mutluay, Anas Aaqel Salim Salim Al-Ani, Arzu Tezvergil-Mutluay, Thiago Henrique Scarabello Stape, Patrik Wik |
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| Rok vydání: | 2018 |
| Předmět: |
Molar
Adult Materials science Scanning electron microscope Biomedical Engineering 02 engineering and technology Biomaterials 03 medical and health sciences chemistry.chemical_compound Young Adult 0302 clinical medicine stomatognathic system Etching (microfabrication) Tensile Strength Dentin medicine Humans Composite material Phosphoric acid Bonded interface ta313 Bond strength technology industry and agriculture Adhesiveness 030206 dentistry 021001 nanoscience & nanotechnology medicine.anatomical_structure chemistry Mechanics of Materials Dental Etching Adhesive 0210 nano-technology |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 86 |
| ISSN: | 1878-0180 |
| Popis: | Objectives To evaluate whether selective dentin etching protocols using reduced phosphoric acid (H3PO4) etching-times would affect the resin-dentin interaction of a universal adhesive to improve long-term bonding effectiveness. Methods Mid-coronal flat dentin surfaces were produced on sound third molars, selectively etched with 32% H3PO4 for 3, 5, 10 or 15 s and bonded with a universal adhesive (Scotchbond Universal, 3 M ESPE: SU). SU in self-etch mode and a three-step etch-and-rinse adhesive were used as control groups. Bonded specimens were stored in deionized water for 24 h and sectioned into beams (cross sectional area of 0.7 mm2). Micro-tensile bond strength test (n = 6) and nanoleakage evaluation were performed immediately, after thermocycling or 6-month storage in artificial saliva. Energy dispersive X-ray analysis (n = 6) was performed to determine the residual Ca-content ratio at the hybrid layers and scanning electron microscopy (SEM) was used to observe the micromorphology of the etched dentin surfaces before and after SU application. Data were analyzed by ANOVA and Tukey test (α = 0.05). Results Selective dentin etching for 3 s improved the interaction depth of the tested universal adhesive without overexposing demineralized collagen or reducing Ca-content availability at the bonded interface. The improved immediate bond strengths of the selective etching protocol remained significantly higher (p 0.05) in silver uptake levels compared to those produced on non-etched dentin. Conclusions Despite the adjunctive conclusion that universal adhesives used in self-etch mode produce superior long-term dentin bonding compared to the etch-and-rinse mode, selective etching for 3 s with conventionally used H3PO4 improves dentin bonding effectiveness; nonetheless, longer etching times should be strictly avoided. |
| Databáze: | OpenAIRE |
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