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Influence of Particle and Air-Abrasion Moment on Y-TZP Surface Characterization and Bond Strength.
Martins, Samira Branco; Abi-Rached, Filipe de Oliveira; Adabo, Gelson Luis; Baldissara, Paolo; Fonseca, Renata Garcia.
Afiliação
  • Martins SB; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil.
  • Abi-Rached FO; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil.
  • Adabo GL; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil.
  • Baldissara P; Department of Oral Sciences, Alma Mater Studiorum University of Bologna, Italy.
  • Fonseca RG; Department of Dental Materials and Prosthodontics, Araraquara Dental School, UNESP, Araraquara, São Paulo, Brazil.
J Prosthodont ; 28(1): e271-e278, 2019 Jan.
Article em En | MEDLINE | ID: mdl-29235196
PURPOSE: To evaluate the influence of particle and air-abrasion on the surface characterization and shear bond strength (SBS) of a Y-TZP ceramic with a resin cement. MATERIALS AND METHODS: Y-TZP specimens were air-abraded with 50 µm alumina particles; 120 µm alumina particles; 30 µm silica-coated alumina particles (Rocatec Soft); 110 µm silica-coated alumina particles (Rocatec Plus). Air-abrasion was performed before (BS); after (AS); before and after (BAS) zirconia sintering. Surface characterization included roughness (n = 10), wettability (n = 10), morphology (n = 2), and elemental composition (n = 2). For SBS (n = 11), composite resin discs were bonded to the air-abraded and silane-treated zirconia surface, with the resin cement RelyX ARC. Failure mode was determined. Roughness, wettability, and SBS data were analyzed by two-way ANOVA with pairwise interaction and Tukey's test (α = 0.05). RESULTS: Air-abrasion performed with coarser particles at BS and BAS moments provided the highest roughness values, while the lowest roughness values were observed with particles combined with AS moment (p < 0.01). Rocatec Plus provided lower contact angle than the 120 µm alumina particles (p = 0.013), and BAS exhibited lower contact angle than BS (p = 0.002). The combinations 120 µm/BS and the silica-coated alumina particles/AS and /BAS showed the highest SBS (p < 0.05). The combination of each particle/BAS was statistically similar to the same particle/AS. Failure mode was 100% adhesive for all groups. The interaction particle size/air-abrasion moment determined the morphological pattern. Silicon was observed only in the Rocatec groups. CONCLUSIONS: Roughness was influenced by the particle size and was higher when the zirconia was air-abraded in its green stage. The particle composition played an important role in the wettability and both studied air-abrasion moments provided similar wettability than the one in which air-abrasion is usually performed. The highest SBS values were observed in the three moments, by using certain particles for each moment.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ítrio / Zircônio / Cimentos de Resina / Abrasão Dental por Ar / Resistência ao Cisalhamento Limite: Humans Idioma: En Revista: J Prosthodont Assunto da revista: ODONTOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ítrio / Zircônio / Cimentos de Resina / Abrasão Dental por Ar / Resistência ao Cisalhamento Limite: Humans Idioma: En Revista: J Prosthodont Assunto da revista: ODONTOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos