Objective: This study aimed to investigate the impact of artificial aging on color stability and hardness nanocomposite resin. Methods: Four resin materials were used: Filtek Z350 XT (FZ), Synergy D6 (SD), Grandio (GD), Clearfil Majesty Esthetic (CM). Thirty specimens created from each material, which divided into three (A,B,C) groups 10 each. For values visual lightness (L*), degree redness gr...

This article reviews glycation stress as a factor linked to age-related diseases and functional and structural alterations of the skin. Photo-aging and glycation stress are major causes of skin deterioration. Glycation occurs when a reducing sugar, such as glucose or fructose, combines with a protein in a non-enzymatic reaction forming a glycated protein. Further reactions form advanced glycati...

PURPOSE To determine the bond stability and the change in interfacial ultrastructure of a conventional glassionomer cement bonded to dentin, with and without pretreatment using a polyalkenoic acid conditioner. MATERIALS AND METHODS The occlusal dentin surfaces of 10 teeth were ground flat. Glass-ionomer cement was bonded to the surfaces either with or without polyalkenoic acid conditioning. T...

The effect of reinforcement in the cross-linked poly(propylene fumarate-co-caprolactone diol) thermoset composites based on Kevlar fibres and hydroxyapatite was studied. Cross-linked poly(propylene fumarate-co-caprolactone diol) was also studied without any reinforcement for comparison. The reinforcing fibre acts as a barrier for the curing reaction leading to longer setting time and lesser cro...

OBJECTIVE To study the effect of three energy drinks on the color stability of nanofilled composite resins after different periods of aging time. MATERIALS AND METHODS Composite resin disks, 6 mm diameter, 3 mm thickness were prepared from Filtec Z350 XT, Tetric EvoCeram, and Filtec Z250 XT. Specimens from each material were tested after aging with Red Bull, Bison and Power Horse energy drink...

Objectives: Aging is a sensitive period in life. Due to the increase aging population and possibility of mild cognitive impairment (MCI) depression elderly, it necessary prevent Alzheimer’s disease these patients by improving their status depression. The present study aims investigate effect rehabilitation on older men with MCI. Methods & Materials: This quasi-experimental pretest/posttest ...

Molecular changes during aging have been studied to understand the mechanism of aging progress. Herein, changes in microRNA (miRNA) expression in the whole blood of mice were studied to systemically reverse aging and propose them as non-invasive biomarkers. Through next-generation sequencing analysis, we selected 27 differentially expressed miRNAs during aging. The most recognized function invo...