Micro-morphological changes prior to adhesive bonding: high-alumina and glassy-matrix ceramics
Braz. oral res
;
22(2): 158-163, 2008. ilus
Article
in English
| LILACS
| ID: lil-485956
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.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Acid Etching, Dental
/
Ceramics
/
Dental Bonding
/
Resin Cements
/
Aluminum Oxide
Language:
English
Journal:
Braz. oral res
Journal subject:
Dentistry
Year:
2008
Type:
Article
Affiliation country:
Brazil
/
Netherlands
/
United States
Institution/Affiliation country:
Federal University of Santa Maria/BR
/
Institute for Energy and Nuclear Research/BR
/
New York University College of Dentistry/US
/
University of Alabama at Birmingham/US
/
University of Groningen/NL
Similar
MEDLINE
...
LILACS
LIS