Track topics on Twitter Track topics that are important to you
The aim of this study is to evaluate the effect of chitosan or nanodiamond incorporation on the color stability and surface roughness of a bisacrylic resin subjected to artificial aging. Four bisacrylic resins were evaluated, namely, control, chitosan-modified material, nanodiamond-modified material, and chitosan-nanodiamond-modified material. Twenty-four specimens were prepared for each material. The surface roughness was determined using a profilometer with a cut-off of 0.25 mm. The baseline color was measured according to the CIE L*a*b* system using a reflectance spectrophotometer. After these tests, the specimens were individually immersed in cola soft drink, red wine, or distilled water (n = 8) for 28 days. After the aging, the surface roughness and final color were re-evaluated. The color stability was determined using the difference between the coordinates obtained before and after the aging process. The data on roughness and color change were evaluated using ANOVA and the Tukey test (α = 0.05). The results show that the incorporation of nanodiamonds and chitosan into a bisacrylic resin provided a better color stability to the materials (p = 0.007). The storage in red wine resulted in a higher variation in the surface roughness values, especially when only the nanodiamond was incorporated to the material (p < 0.05). The incorporation of both chitosan and nanodiamonds are promising in providing an improvement in the properties of the bisacrylic resin when they are simultaneously incorporated in the product.
This article was published in the following journal.
Name: Brazilian oral research
The agglomeration of nanodiamond severely reduces the reinforcement in matrix of composites although it is often used as a reinforcing phase. In this study, nanodiamond was modified by phospholipid to...
Chitosan-bentonite clay composite was prepared for use as adsorbent matrix of water-soluble natural dyes. The addition of chitosan resulted in a relatively rough texture of the composite compared with...
To evaluate the roughness and color change of a conventional acrylic resin and a bis-acryl resin, submitted to different types of polishing and exposed to a staining solution.
The goal of the study is to develop a novel pH-indicating intelligent packaging by using purple potato extractions (PPE), chitosan and surface-deacetylated chitin nanofibers (CN). Since the major pH-s...
A solid surface morphology is of great importance for the fundamental research in the field of hydrophobic materials. Commercial sand core funnels (SCs) are embedded with multilevel pore size and surf...
In this study we intend to find out the pattern of biofilm accumulation in vivo on various surface finishings. Our intention is to prepare Polymethylmetacrylate squers on orthodontical br...
Vacuum-formed retainers are clear or transparent retainers, that hold the teeth in the new position after active orthodontic treatment. These custom made appliances are becoming popular th...
The "dry eye syndrome" DES is a highly prevalent ocular disease, in particular in the elderly population. One mainstay of therapy for patients suffering from DES is the use of topically ad...
Chitosan is a natural product that is produced commercially through the deacetylation of chitin, which is found in the exoskeleton of crustaceans. It has been suggested that chitosan has a...
Dental overglaze is consist of colorless glass powder and applied to the fired crown surface to provide a glossy surface,Adjustment procedure break the production of the glaze layer throug...
Mental processing of chromatic signals (COLOR VISION) from the eye by the VISUAL CORTEX where they are converted into symbolic representations. Color perception involves numerous neurons, and is influenced not only by the distribution of wavelengths from the viewed object, but also by its background color and brightness contrast at its boundary.
A form of phototherapy using color to influence health and to treat various physical or mental disorders. The color rays may be in the visible or invisible spectrum and can be administered through colored lights or applied mentally through suggestion.
Food derived from genetically modified organisms (ORGANISMS, GENETICALLY MODIFIED).
An emulsion of solid color which when spread over a surface leaves a thin decorative and or protective coating.
Sequences within RNA that regulate the processing, stability (RNA STABILITY) or translation (TRANSLATION, GENETIC) of RNA.