12 documents found, page 1 of 2
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...
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 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...
Suitability of 3D printed pieces of nanocrystalline zirconia for dental applica...
Branco, A. C.; Silva, R.; Santos, T.; Jorge, H.; Rodrigues, A. R.; Fernandes, R.; Bandarra, S.; Barahona, I.; Matos, A. P. A.; Lorenz, K.; Polido, M.Objectives: The main goal of this work is to evaluate the suitability of nanostructured zirconia pieces obtained by robocasting additive manufacturing (AM), for dental applications. Methods: The density, crystalline structure, morphology/porosity, surface roughness, hardness, toughness, wettability and biocompatibility of the produced samples were compared with those of samples obtained by conventional subtract...
Tribological performance of the pair human teeth vs 3D printed zirconia : an in...
Branco, A. C.; Silva, R.; Jorge, H.; Santos, T.; Lorenz, K.; Polido, M.; Colaço, R.; Serro, A. P.; Figueiredo-Pina, C. G.This study aims to evaluate the tribological performance of the pair human teeth/robocasted zirconia, with a special focus on the enamel wear mechanisms. Zirconia pieces produced by robocasting (RC) and unidirectional compression (UC) were compared in terms of crystalline structure, density, porosity, hardness and toughness. Chewing simulation tests were performed against human dental cusps. The cusps wear was ...
Depth of cure of bulk-fill light cured composite resins with different initiators
Santos, A.; Proença, L.; Polido, M.; Azul, A. C.
Immediate microleakage in direct and indirect restorative procedures
Cruz, J. Nunes da; Azul, A. C.; Moura, P.; Polido, M.
The effect of aluminum oxide sandblasting on immediate dentin sealing
Belbut, M.; Mendes, José João; Polido, M.; Rua, J.; Azul, A. M.; Proença, L.
Effect of bleaching teeth with hydrogen peroxide on the morphology, hydrophilic...
Rodrigues, F. T.; Serro, A. P.; Polido, M.; Ramalho, A.; Figueiredo-Pina, C. G.The tooth whitening process is intended to restore the original color of teeth. It consists of the application of oxidizing agents, including hydrogen peroxide. Although these products considerably improve the color of teeth, their effects on other properties of enamel are not fully understood. This work aimed to study the effects of hydrogen peroxide concentration on hydrophilicity, roughness, morphology, and ...
Influência de adesivos universais na reparação de cerâmica de Dissilicato de lítio
Martins, B.; Proença, L.; Polido, M.; Azul, A. C.; Moura, P. Melo e