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- Title
Which low-fusing porcelain glaze treatment technique is better to promote a vitreous surface on Y-TZP ceramic?
- Authors
Soares Miranda, Jean; Veloso Malta, Natália; Almeida de Carvalho, Ronaldo Luís; de Assunção e. Souza, Rodrigo Othávio; Barros Machado, João Paulo; Pereira Leite, Fabíola Pessôa
- Abstract
OBJECTIVE: To evaluated the influence of two types of low-fusing porcelain glaze application on the surface of a zirconia ceramics stabilized by yttrium (Y-TZP). METHODS: Y-TZP specimens were divided into five groups (n=5) according the surface treatments: control (CO), no treatment was performed; application of a thin low-fusing porcelain glass layer by the powder/liquid technique (GPL); GPL followed by 10% hydrofluoric acid (HF) etching (GPL-HF); glaze spray application (GS); GS followed by 10% HF etching (GS-HF). Roughness measurements contact angle, x-ray diffraction, energy-dispersive spectroscopy (EDS) and scanning electron microscope (SEM) analysis were performed. RESULTS: ANOVA and Tukey tests revealed that GPL had significantly lower contact angle values than the other groups (GPL:50.31°; GPL-HF: 72.73°; GS-HF: 81.73°; CO: 96.48°; GS:101.30°; p=0.001). GPL-HF presented a significant higher roughness (Ra/Rq: 2658.0/3367.0 ηm; p=0.001) than the other groups (GPL: 872.1/1162.0 ηm; GS-HF: 383.0/603.6 ηm; GS: 303.4/391.3 ηm; CO: 263.4/339.1 ηm). The X-ray diffraction analysis just tetragonal phase in all groups. EDS and SEM analysis show a highest amount of silica on GPL and GPL-HF surface. CONCLUSION: the application of the low-fusing porcelain glaze by the powder/liquid technique followed by the HF etching promoted a better surface to micromechanical and chemical adhesion.
- Subjects
DENTAL metallurgy; ANALYSIS of variance; DENTAL ceramics; STATISTICS; DATA analysis; TREATMENT effectiveness; SURFACE properties
- Publication
Revista Odonto Ciencia, 2017, Vol 32, Issue 4, p174
- ISSN
0102-9460
- Publication type
Article
- DOI
10.15448/1980-6523.2017.4.28749