Micro-morphological changes prior to adhesive bonding: High-Alumina and glassy-matrix ceramics

Marco Cícero Bottino, Mutlu Özcan, Paulo Guilherme Coelho, Luiz Felipe Valandro, José Carlos Bressiani, Ana Helena Almeida Bressiani

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

The aim of this study was to qualitatively demonstrate surface micro-morphological changes after the employment of different surface conditioning methods on high-alumina and glassy-matrix dental ceramics. Three disc-shaped high-alumina specimens (In-Ceram Alumina, INC) and 4 glassy-matrix ceramic specimens (Vitadur Alpha, V) (diameter: 5 mm and height: 5 mm) were manufactured. INC specimens were submitted to 3 different surface conditioning methods: INC1 - Polishing with silicon carbide papers (SiC); INC2- Chairside air-borne particle abrasion (50 μm Al2O3); INC3 - Chairside silica coating (CoJet; 30 μm SiOx). Vitadur Alpha (V) specimens were subjected to 4 different surface conditioning methods: V1 - Polishing with SiC papers; V2 - HF acid etching; V3 - Chairside air-borne particle abrasion (50 μm Al2O3); V4 - Chairside silica coating (30 μm SiOx). Following completion of the surface conditioning methods, the specimens were analyzed using SEM. After polishing with SiC, the surfaces of V specimens remained relatively smooth while those of INC exhibited topographic irregularities. Chairside air-abrasion with either aluminum oxide or silica particles produced retentive patterns on both INC and V specimens, with smoother patterns observed after silica coating. V specimens etched with HF presented a highly porous surface. Chairside tribochemical silica coating resulted in smoother surfaces with particles embedded on the surface even after air-blasting. Surface conditioning using air-borne particle abrasion with either 50 μm alumina or 30 μm silica particles exhibited qualitatively comparable rough surfaces for both INC and V. HF acid gel created the most micro-retentive surface for the glassy-matrix ceramic tested.

Original languageEnglish (US)
Pages (from-to)158-163
Number of pages6
JournalBrazilian Oral Research
Volume22
Issue number2
DOIs
StatePublished - 2008

Keywords

  • Acid etching dental
  • Air abrasion dental
  • Ceramics
  • Hydrofluoric acid

ASJC Scopus subject areas

  • Dentistry(all)

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    Bottino, M. C., Özcan, M., Coelho, P. G., Valandro, L. F., Bressiani, J. C., & Bressiani, A. H. A. (2008). Micro-morphological changes prior to adhesive bonding: High-Alumina and glassy-matrix ceramics. Brazilian Oral Research, 22(2), 158-163. https://doi.org/10.1590/S1806-83242008000200011