28 documents found, page 1 of 3
On capillary viscosity measurements: how far do surface tension effects go?
Sequeira, Maria Carolina; Caetano, Fernando J. P.; Diogo, Herminio; Fareleira, João M. N. A.; Santos, Fernando J. V.; Serro, A. P.Viscosity is a fundamental thermophysical property of liquids making it very important particularly in the industry. Capillary viscometers have been widely used for viscosity measurements in different applications, the most relevant being the definition of viscosity standards, traceable to the primary water viscosity standard, by metrological institutions and industrial applications, mostly for quality control....
Wear of zirconia/leucite glass-ceramics composites: A chewing simulator study
Branco, A. C.; Santos, T.; Polido, M.; Colaço, R.; Serro, A. P.; Figueiredo-Pina, CélioLeucite and zirconia are commonly used in the production of prosthetic dental materials. Leucite presents attractive optical properties but low toughness and wear resistance, which limits its use. Zirconia has much higher toughness, but due to aesthetic reasons and ageing issues, needs to be glass veneered. Chipping of such veneer is usually responsible for the abnormal wear induced on the antagonist teeth. Leu...
3D-Printing of zirconia dental prostheses
Rodrigues, I.; Olhero, S.; Guedes, M.; Serro, A. P.; Figueiredo-Pina, C. G.
Hydrogels based on poly(vinyl alcohol) for cartilage substitution
Oliveira, A. S.; Colaço, R.; Serro, A. P.
Effect of pH of H2O2 solutions on the morphology and wear resistance of human d...
Branco, A. C.; Polido, M.; Colaço, R.; Figueiredo-Pina, C. G.; Serro, A. P.
Effect of the saliva biomolecules on the interface zirconia/Ti6Al4V triboactivity
Teixeira, H.; Serro, A. P.; Figueiredo-Pina, C. G.
Influence of the liquid phase content and presence of hydroxypropyl methyl cell...
Reis, M.; Figueiredo, L.; Pimenta, A.; Ribeiro, N.; Salema-Oom, M.; Colaço, R.; Serro, A. P.
Physically crosslinked polyvinyl alcohol hydrogels as synthetic cartilage mater...
Schweizer, S.; Monteiro, I.; Oliveira, A. S.; Nolasco, P.; Colaço, R.; Serro, A. P.
Effect of albumin, urea, lysozyme and mucin on the triboactivity of Ti6Al4V/zir...
Teixeira, H.; Branco, A. C.; Rodrigues, I.; Silva, D.; Cardoso, S.; Colaço, R.; Serro, A. P.; Figueiredo-Pina, CélioThe titanium implant/zirconia abutment interface can suffer failure upon mechanical and biological issues, ul- timately leading to the loss of the artificial tooth. The study of the effect of the organic compounds present in saliva on the tribological behavior of these systems is of utmost importance to understand the failure mechanisms and better mimic the in vivo conditions. The aim of the present work is to ...
Effect of H2O2 solution’s pH on the human enamel micro and nanowear
Branco, A. C; Rodrigues, I.; Paradiso, P.; Polido, M.; Colaço, R.; Figueiredo-Pina, C. G.; Serro, A. P."The effect of 30% H2O2 solutions with different pH (2, 4 and 6) on the wear of human dental enamel was studied. Additionally, the whitening efficiency and changes in hardness and morphology were evaluated. The enamel tribological response was accessed through two different approaches: ball-on-plate and atomic force microscopy (AFM), the later following a tribological model based on a single asperity contact. T...