Effect of Sandblasting Angle and Distance on Biaxial Flexural Strength of Zirconia-based Ceramics
| Autor: | Somayeh Zeighami, Hoseinali Mahgoli, Safoura Ghodsi, Ahmad Rohanian, Ali Gheidari |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Yield (engineering) Surface Properties Dental Cements 02 engineering and technology Surface finish 03 medical and health sciences 0302 clinical medicine Flexural strength Materials Testing Surface roughness Humans Cubic zirconia Ceramic Composite material General Dentistry Bond strength Significant difference Dental Bonding 030206 dentistry 021001 nanoscience & nanotechnology Dental Porcelain Dental Veneers visual_art Dental Etching visual_art.visual_art_medium Zirconium 0210 nano-technology |
| Zdroj: | The journal of contemporary dental practice. 18(6) |
| ISSN: | 1526-3711 |
| Popis: | AimSurface treatment is necessarily required for bonding of zirconia to the veneering porcelain and luting cements. Sandblasting is the most common and probably the most efficient surface treatment method. Sandblasting roughens the surface and may affect the flexural strength of zirconia. Different sandblasting protocols may yield variable results. This study sought to assess the effect of sandblasting angle and distance on the biaxial flexural strength of zirconia-based ceramics.Materials and methodsThisin vitroexperimental study was conducted on 50 zirconia discs measuring 1.2 ± 0.2 mm in thickness and 15 ± 0.2 mm in diameter, which were randomly divided into five groups (n = 10) of one control and four experimental groups subjected to sandblasting with 110 µm aluminum oxide particles under 2 bar pressure for 10 seconds at 15 and 25 mm distances and 45 and 90° angles (between the nozzle head and zirconia surface). Surface roughness was measured by a roughness tester and samples were subjected to thermocycling followed by biaxial flexural strength testing according to ISO6872. The data were analyzed using one-way analysis of variance (p < 0.05).ResultsNo statistically significant difference was noted in the mean biaxial flexural strength of the five groups (p = 0.40). Different sandblasting protocols yielded significantly different surface roughness values (p < 0.001). The highest and the lowest mean surface roughness belonged to 15 mm/90° (0.51 µm) and control (0.001 µm) groups respectively.ConclusionChange in sandblasting angle and distance had no significant effect on the biaxial flexural strength of zirconiabased ceramic, but surface roughness was significantly different in the study groups.Clinical significancesRegardless of sandblasting angle, increasing distance to 25 mm significantly decreases surface roughness that may negatively affect zirconia bond strength.How to cite this articleZeighami S, Gheidari A, Mahgoli H, Rohanian A, Ghodsi S. Effect of Sandblasting Angle and Distance on Biaxial Flexural Strength of Zirconia-based Ceramics. J Contemp Dent Pract 2017;18(6):443-447. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|