Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/243125
Type: Artigo de periódico
Title: The Effect Of Hydrofluoric Acid Concentration On The Bond Strength And Morphology Of The Surface And Interface Of Glass Ceramics To A Resin Cement
Author: Sundfeld Neto
D.; Naves
L. Z.; Costa
A. R.; Correr
A. B.; Consani
S.; Borges
G. A.; Correr-Sobrinho
L.
Abstract: The purpose of this study was to evaluate the influence of various concentrations of hydrofluoric acid (HF) on the surface/interface morphology and mu-shear bond strength (mu SBS) between IPS Empress Esthetic (EST) (Ivoclar Vivadent) and IPS e.max Press (EMX) (Ivoclar Vivadent) ceramics and resin cement. Ceramic blocks were divided into 12 groups for each kind of ceramic. Six different HF concentrations were evaluated: 1%, 2.5%, 5%, 7.5%, 10%, and 15%. All groups were silanated after etching, and half of the specimens within each group received a thin layer of unfilled resin (UR). Three resin cement cylinders were prepared on each ceramic block for mu SBS testing. The specimens were stored in distilled water at 37 degrees C for 24 hours. The mu SBS test was carried out in a universal testing machine at a crosshead speed of 0.5 mm/min until fracture. The data were submitted to three-way analysis of variance andmultiple comparisons were performed using the Tukey post hoc test (p<0.05). The etched surfaces and bonded interfaces were evaluated using scanning electron microscopy. mu SBS means (MPa) for 1%, 2.5%, 5%, 7.5%, 10%, and 15% HF concentrations were, respectively, 25.2, 27.2, 30.1, 31.4, 33.3, and 31.8. mu SBS means with or without UR application measured 32.24 and 27.4, respectively; EST and EMX measured 29.8 and 29.9, respectively. For the HF concentrations, 10% and 15% showed higher mu SBS means than did 1% and 2.5% (p<0.05); 7.5% was higher than 1% (p<0.05); and no statistical differences were found among the other concentrations (p>0.05). When evaluating UR, mu SBS mean was significantly higher and better infiltration was observed on the etched surfaces. No statistical difference was found between the ceramics. The HF concentration and UR influenced the bond strength and surface/interface morphology.
Subject: Composite Resin
Dental Ceramics
Adhesive Resin
Luting Agents
Porcelain
Microstructure
Durability
Country: INDIANAPOLIS
Editor: OPERATIVE DENTISTRY INC
Citation: The Effect Of Hydrofluoric Acid Concentration On The Bond Strength And Morphology Of The Surface And Interface Of Glass Ceramics To A Resin Cement. Operative Dentistry Inc, v. 40, p. 470-479 SEP-OCT-2015.
Rights: fechado
Identifier DOI: 10.2341/14-133-L
Address: http://www.jopdentonline.org/doi/10.2341/14-133-L?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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