Tensile strength of Ni-Cr copings subjected to inner surface sandblasting using different cementing agents: An<i>in vitro</i>study

Peixoto, Raniel Fernandes; Hermanson, Marília Pedrão; Pupim, Denise; Rodrigues, Rossana Lott; Antunes, Rossana Pereira de Almeida; Mattos, Maria da Glória Chiarello de

doi:10.3109/00016357.2015.1050602

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“…However, retention of the temporary cement should be adequate to maintain the restoration in function, but low enough to allow easy removal of the temporary restoration before the final restoration (5). In this context, tensile strength tests are often used and they consist in the use of a load required for the removal of crowns during the traction movement (17). The present study initially evaluated the tensile strength of temporary crowns as they were cemented with four temporary cements (Table 2).…”

Section: Discussionmentioning

confidence: 99%

“…Plaster dies were produced from the cast metal cores to obtain the Ni-Cr copings according to the methodology described by Peixoto et al (17). The metal cores were fixed in a rigid plastic ring with chemically activated acrylic resin, molded with condensation silicone impression material (Optosil ® /Xantopren ® ) and waxed.…”

Section: Fabrication Of Ni-cr Copingsmentioning

confidence: 99%

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Influence of Temporary Cements on the Bond Strength of Self-Adhesive Cement to the Metal Coronal Substrate

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This research evaluated the influence of temporary cements (eugenol-containing [EC] or eugenol-free [EF]) on the tensile strength of Ni-Cr copings fixed with self-adhesive resin cement to the metal coronal substrate. Thirty-six temporary crowns were divided into 4 groups (n=9) according to the temporary cements: Provy, Dentsply (eugenol-containing), Temp Cem, Vigodent (eugenol-containing), RelyX Temp NE, 3M ESPE (eugenol-free) and Temp Bond NE, Kerr Corp (eugenol-free). After 24 h of temporary cementation, tensile strength tests were performed in a universal testing machine at a crosshead speed of 0.5 mm/min and 1 kN (100 kgf) load cell. Afterwards, the cast metal cores were cleaned by scraping with curettes and air jet. Thirty-six Ni-Cr copings were cemented to the cast metal cores with self-adhesive resin cement (RelyX U200, 3M ESPE). Tensile strength tests were performed again. In the temporary cementation, Temp Bond NE (12.91 ± 2.54) and Temp Cem (12.22 ± 2.96) presented the highest values of tensile strength and were statistically similar to each other (p>0.05). Statistically significant difference (p<0.05) was observed only between Provy (164.44 ± 31.23) and Temp Bond NE (88.48 ± 21.83) after cementation of Ni-Cr copings with self-adhesive resin cement. In addition, Temp Cem (120.68 ± 48.27) and RelyX Temp NE (103.04 ± 26.09) showed intermediate tensile strength values. In conclusion, the Provy eugenol-containing temporary cement was associated with the highest bond strength among the resin cements when Ni-Cr copings were cemented to cast metal cores. However, the eugenol cannot be considered a determining factor in increased bond strength, since the other tested cements (1 eugenol-containing and 2 eugenol-free) were similar.

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Section: Discussionmentioning

confidence: 99%

Section: Fabrication Of Ni-cr Copingsmentioning

confidence: 99%

Influence of Temporary Cements on the Bond Strength of Self-Adhesive Cement to the Metal Coronal Substrate

et al. 2015

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Tensile strength of Ni-Cr copings subjected to inner surface sandblasting using different cementing agents: Anin vitrostudy

Abstract: Zinc phosphate cements and RMGIC showed similar retention. Additionally, the retention of the cements was not influenced by either thermal cycling or the particle size of the aluminum oxide.

Cited by 1 publication

References 25 publications

Influence of Temporary Cements on the Bond Strength of Self-Adhesive Cement to the Metal Coronal Substrate

Influence of Temporary Cements on the Bond Strength of Self-Adhesive Cement to the Metal Coronal Substrate

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