Dental zirconia can be etched by hydrofluoric acid

Dental zirconia can be etched by hydrofluoric acid.

The surface morphology and crystal structure change of dental zirconia after hydrofluoric acid (HF) etching were evaluated. Four groups of sintered zirconia specimens were 1) control group, 2) immersion in 9.5%HF at 25°C for 1, 2, 3, or 24 h, 3) immersion in 9.5%HF at 80°C for 1, 3, 5, or 30 min and 4) immersion in 48%HF at 25°C for 30 or 60 min. The specimens were evaluated under SEM and XRD. ...

Improved Resin–Zirconia Bonding by Room Temperature Hydrofluoric Acid Etching

This in vitro study was conducted to evaluate the shear bond strength of "non-self-adhesive" resin to dental zirconia etched with hydrofluoric acid (HF) at room temperature and to compare it to that of air-abraded zirconia. Sintered zirconia plates were air-abraded (control) or etched with 10%, 20%, or 30% HF for either 5 or 30 min. After cleaning, the surfaces were characterized using various ...

Hydrofluoric acid.

Does Diarrhoea Causes Cataract? Can Cataract be Prevented by Aspirin?

Loss of transparency of the lens is termed cataract which is one of the commonest causes of blindness throughout the world. This major health problem appears to be much commoner in many developing countries such as India and Pakistan, where it causes visual disability at a substantially earlier age and several hypotheses have been put forward to explain this higher prevalence in these areas. Re...

Etching with Hydrofluoric Acid

Photoresists, wafers, plating solutions, etchants and solvents ... Phone: +49 731 977343 0 www.microchemicals.eu [email protected] Etching of SiO2, Quartz, and Glasses with HF Hydrofluoric acid is the only etchant which attacks amorphous SiO2, quartz, or glasses at significant high etch rate. However, HF is not only a strong corrosive, but also highly toxic towards higher concentrations: ...