Publications by authors named "R Vasiliu"
Article Synopsis
- The study explores how the surface roughness of thermoplastic PETG dental appliances affects the growth of Candida albicans biofilms and how an alkaline peroxide disinfectant interacts with these surfaces.
- Two types of PETG materials (Crystal and Duran) were tested with half subjected to thermal cycling, allowing for the comparison of their surface characteristics and biofilm growth.
- The results indicate that while surface roughness affects biofilm formation, the disinfectant effectively reduces biofilm development, regardless of the material or the effects of artificial aging on the surfaces.
Article Synopsis
- - PETG (polyethylene terephthalate glycol) is a useful thermoplastic in medicine, noted for its strength and flexibility, but its performance can be influenced by environmental factors, prompting a study on its water sorption in simulated oral conditions.
- - The study evaluated four types of PETG materials (Leone, Crystal, Erkodur, and Duran) by measuring their water absorption and surface roughness before and after immersion in artificial saliva at different pH levels using advanced techniques like AFM.
- - Results showed that all materials absorbed water, with the highest absorption in Leone samples, particularly in a basic saliva environment. Additionally, surface roughness decreased after desalination, indicating changes in surface characteristics due to saliva
Clear thermoplastic materials have increased in popularity in the dental field due to their various applications, combination of excellent aesthetics, and good biomechanical behavior, but they may be influenced by different environmental conditions. The purpose of the present study was to assess the topographical and optical characteristics of thermoplastic dental appliances materials relative to water sorption. PET-G polyester thermoplastic materials were evaluated in this study.
View Article and Find Full Text PDF(1) Background: Considering that the appearance of a dental material is an important factor that contributes to the success of prosthetic restorations. The purpose of this study is to investigate the optical properties and color changes among the layers of three commercial zirconias, to compare the aspect of the polished and glazed surfaces before and after aging and to evaluate the effects of hydrothermal degradation on their aesthetics. (2) Methods: Forty-eight plate-shaped samples were sectioned from presintered blocks of each multilayer translucent zirconia with different Yttrium content: Ceramill Zolid fx ML (5 mol%) = CeZ, STML (4 mol%) = STM, IPS e.
View Article and Find Full Text PDFArticle Synopsis
- The study examined how water absorption and aging affect the surface properties, hardness, and color stability of different PEEK materials.
- Both modified and unmodified PEEK samples were immersed in water and subjected to thermal cycling to evaluate changes.
- Results showed that all PEEK materials became saturated with water within a week and experienced an increase in roughness, but only minimal color changes were observed after a year of aging.