Full-contour Y-TZP ceramic surface roughness effect on synthetic hydroxyapatite wear
| Autor: | N. Blaine Cook, Alaa H.A. Sabrah, Marco C. Bottino, Palika Luangruangrong, Anderson T. Hara |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Ceramics
Hot Temperature Materials science Surface Properties Polishing Biocompatible Materials Surface finish Brass Materials Testing Surface roughness Humans Yttrium General Materials Science Cubic zirconia Ceramic Composite material General Dentistry Acrylic resin Dental Polishing Durapatite Mechanics of Materials visual_art Microscopy Electron Scanning visual_art.visual_art_medium Computer-Aided Design Zirconium Profilometer Diamond |
| Zdroj: | Dental Materials. 29:666-673 |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2013.03.008 |
| Popis: | Objective To investigate the effects of polishing techniques on the surface roughness of Y-TZP ceramic and on the wear behavior of synthetic hydroxyapatite (HA). Methods Thirty-two full-contour Y-TZP (Diazir ® ) sliders ( φ = 2 mm × 1.5 mm in height) were manufactured using CAD/CAM, embedded in acrylic resin using brass holders, and randomly allocated into four groups ( n = 8): according to the finishing/polishing procedure: G1-as-machined, G2-glazed, G3-diamond bur finishing and G4 − G3 + OptraFine ® polishing kit. Thirty-two sintered HA disks ( φ = 13 mm × 2.9 mm in height) were similarly mounted in brass holders. Y-TZP sliders baseline surface roughness values (Ra and Rq, in μm) were recorded using a non-contact profilometer (Proscan 2000). A two-body pin-on-disc wear test was performed. HA height (μm) and volume (mm 3 ) losses were measured. Y-TZP height loss was measured using a digital micrometer. One-way ANOVA was used to determine the effect of the polishing techniques on the surface roughness. Comparisons between groups for differences in antagonist height loss/volume, and slider height loss were performed using one-way ANOVA. Statistical significance was set at α = 0.05. Results Roughness measurements showed significant differences ( p = 0.0001) among the surface treatments with G1 (Ra = 0.84, Rq = 1.13 μm) and G3 (Ra = 0.89, Rq = 1.2 μm) being the roughest, and G2 (Ra = 0.42, Rq = 0.63 μm) the smoothest ( p = 0.0001). Y-TZP slider height loss was highest for the glazed group (35.39 μm), and was lowest for the polished group (6.61 μm) ( p = 0.0001). Antagonist volume and height losses for groups (G1–G3) were similar, while the polished group (1.3 mm 3 , 14.7 μm) showed significant lower values ( p = 0.0001). Significance Although glazed zirconia provides an initially smooth surface, significantly increased antagonist wear was observed compared to the polished Y-TZP zirconia surface. |
| Databáze: | OpenAIRE |
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