The influence of temporary cements on dental adhesive systems for luting cementation

Autor: Carlos Augusto de Oliveira Fernandes, Paulo G. Coelho, Nelson R.F.A. Silva, André Jalles Monteiro, Malvin N. Janal, José Carlos Viana Ribeiro
Rok vydání: 2010
Předmět:
Curing Lights
Dental
Materials science
Time Factors
Surface Properties
Dentistry
Dental Cements
Dental bonding
Microscopy
Atomic Force
Composite Resins
Polyethylene Glycols
Dental Materials
stomatognathic system
Acid Etching
Dental
Polymethacrylic Acids
Dental cement
Tensile Strength
Ultimate tensile strength
Eugenol
Materials Testing
Dentin
medicine
Humans
Bisphenol A-Glycidyl Methacrylate
Composite material
Zinc Oxide-Eugenol Cement
General Dentistry
Cementation
Cement
business.industry
Bond strength
technology
industry
and agriculture
Dental Bonding
Temperature
Water
Cementation (geology)
Organophosphates
Resin Cements
stomatognathic diseases
surgical procedures
operative
medicine.anatomical_structure
Dentin-Bonding Agents
Microscopy
Electron
Scanning
Adhesive
Stress
Mechanical
Zinc Oxide
business
Zdroj: Journal of dentistry. 39(3)
ISSN: 1879-176X
Popis: This study tested the hypothesis that bond strength of total- and self-etching adhesive systems to dentine is not affected by the presence of remnants from either eugenol-containing (EC) or eugenol-free (EF) temporary cements after standardized cleaning procedures.Thirty non-carious human third molars were polished flat to expose dentine surfaces. Provisional acrylic plates were fabricated and cemented either with EC, EF or no temporary cements. All specimens were incubated for 7 days in water at 37°C. The restorations were then taken out and the remnants of temporary cements were mechanically removed with a dental instrument. The dentine surfaces were cleaned with pumice and treated with either total-etching (TE) or self-etching (SE) dental adhesive systems. Atomic force microscopy was used to examine the presence of remnants of temporary cements before and after dentine cleaning procedures. Composite resin build-ups were fabricated and cemented to the bonded dentine surfaces with a resin luting cement. The specimens were then sectioned to obtain 0.9mm(2) beams for microtensile bond strength testing. Fractographic analysis was performed by optical and scanning electron microscopy.ANOVA showed lower mean microtensile bond strength in groups of specimens treated with EC temporary cement than in groups treated with either no cement or an EF cement (p0.05). Mean microtensile bond strength was lower in groups employing the SE rather than the TE adhesive system (p0.001). SE samples were also more likely to fail during initial processing of the samples. There was no evidence of interaction between cement and adhesive system effects on tensile strength. Fractographic analysis indicated different primary failure modes for SE and TE bonding systems, at the dentine-adhesive interface and at the resin cement-resin composite interface, respectively.The use of eugenol-containing temporary cements prior to indirect bonding restorations reduce, to a statistically similar extent, the bond strength of both total- and self-etching adhesive systems to dentine.
Databáze: OpenAIRE
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