16 documents found, page 1 of 2

Wear of zirconia/leucite glass-ceramics composites: A chewing simulator study

Leucite 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...

Hydrogels based on poly(vinyl alcohol) for cartilage substitution

Effect of pH of H2O2 solutions on the morphology and wear resistance of human d...

Influence of the liquid phase content and presence of hydroxypropyl methyl cell...

Physically crosslinked polyvinyl alcohol hydrogels as synthetic cartilage mater...

Effect of albumin, urea, lysozyme and mucin on the triboactivity of Ti6Al4V/zir...

The 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

"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...

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...

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 ...

Tribological behavior of restorative dental microcomposites after exposure to m...

In this work, the effect of the exposure to acids that are usually present in the mouth environment on the tribological behavior of restorative dental microcomposites is evaluated. A commercial microcomposite widely used in dentistry (Filtek Z250) and a strong and a week acid that are part of the mouth environment (hydrochloric and lactic acid, respectively) were chosen for the study. Samples of the microcompos...