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Methacrylate bonding to zirconia by in situ silica nanoparticle surface deposition.
Oliveira-Ogliari, Aline; Collares, Fabrício M; Feitosa, Victor P; Sauro, Salvatore; Ogliari, Fabrício A; Moraes, Rafael R.
Afiliação
  • Oliveira-Ogliari A; Biomaterials Development and Control Center, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
  • Collares FM; Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
  • Feitosa VP; School of Dentistry, Federal University of Ceará, Fortaleza, Brazil.
  • Sauro S; Dental Biomaterials and Minimally Invasive Dentistry, Departamento de Odontología, Universidad CEU-Cardenal Herrera, Valencia, Spain. Electronic address: salvatore.sauro@uch.ceu.es.
  • Ogliari FA; School of Materials Engineering, Federal University of Pelotas, Pelotas, Brazil.
  • Moraes RR; Biomaterials Development and Control Center, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
Dent Mater ; 31(1): 68-76, 2015 Jan.
Article em En | MEDLINE | ID: mdl-25498521
OBJECTIVE: This study introduces an innovative method to enhance adhesion of methacrylate-based cements to yttria-stabilized zirconia (Y-TZP) by means of a silica-nanoparticle deposition process. METHODS: Two alkoxide organic precursors, tetraethyl-orthosilicate (TEOS) and zirconium tert-butoxide (ZTB) were diluted in hexane at different concentrations in order to obtain several experimental materials to enhance deposition of a SiO(x) reactive layer to Y-TZP. This deposition was attained via sintering alkoxide precursors directly on pre-sintered zirconia (infiltration method­INF) or application on the surface of fully sintered zirconia (coating method­COA). Untreated specimens and a commercial tribochemical silica coating were also tested as controls and all the treated Y-TZP specimens were analyzed using SEM-EDX. Specimens were bonded using silane, adhesive and dual-cure luting cement and submitted to shear bond strength test after different water storage periods (24 h, 3-, 6- and 12-months). RESULTS: SEM-EDX revealed Y-TZP surface covered by silica nanoclusters. The morphology of silica-covered Y-TZP surfaces was influenced by sintering method, employed to deposit nanoclusters. High bond strength (MPa) was observed when using COA method; highest TEOS percentage achieved the greatest bond strengths to Y-TZP surface (36.7±6.3 at 24 h). However, bonds stability was dependent on ZTB presence (32.9±9.7 at 3 months; 32.3±7.1 at 6 months). Regarding INF method, the highest and more stable resin-zirconia bond strength was attained when using experimental solutions containing TEOS and no ZTB. Both sintering methods tested in this study were able to achieve a bonding performance similar to that of classic tribochemical strategies. SIGNIFICANCE: This study demonstrates that it is possible to achieve a reliable and long-lasting bonding between yttria-stabilized zirconia ceramic and methacrylate-based cements when using this novel, simple, and cost-effective bonding approach.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Zircônio / Colagem Dentária / Dióxido de Silício / Metacrilatos Idioma: En Revista: Dent Mater Assunto da revista: ODONTOLOGIA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Zircônio / Colagem Dentária / Dióxido de Silício / Metacrilatos Idioma: En Revista: Dent Mater Assunto da revista: ODONTOLOGIA Ano de publicação: 2015 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido