the aim of this study was to assess the effect of bleaching on elution of monomers from nanofilled and microhybrid composites.80 samples (5mm diameter and 3mm thickness) of each composite were prepared. after curing, half of them were randomly polished. each group was divided into 8 subgroups and immersed in water or 10%, 20% and 30% h2o2 for 3 or 8 hours. eluted bis-gma (bis-phenol a glycidyl ...

BACKGROUND Antibiotic bone cement is commonly used in staged revision arthroplasty as well as the treatment of open fractures. Multiple factors affect antibiotic elution from bone cement. This study was performed to investigate the effect of two variables, the quantity of liquid monomer and the timing of antibiotic addition, on the ultimate elution of antibiotic from bone cement. METHODS Vanc...

As a part of this study, mathematical model based on two-compartment pharmacokinetic system with general fractional derivatives was developed. Its aim to describe the release BisGMA and TEGDMA monomers from composite core resin over three time periods. For purpose, five Clearfil Photo Core samples were prepared elution measured using high performance liquid chromatography at 1, 7 28 days post-i...

A relatively fresh bovine plasma albumin (BPA) preparation (0.65 sulfhydryl group per albumin molecule; 5 to 6% dimer) and an old bovine mercaptalbumin (BMA) preparation (0.72 sulfhydryl group per albumin molecule; 8 to 9 % dimer) were fractionated in a phosphate gradient on DEAE-Sephadex A-SO. Two dimer fractions were obtained. One dimer fraction had a relatively high sulfhydryl content and co...

Objective. This study aimed to evaluate triethylene glycol dimethacrylate (TEGDMA) elution from SDR bulk-fill composite. Methods. Three groups of samples were prepared, including samples polymerized in a 4 mm layer for 20 s, in a 4 mm layer for 40 s, and in a 2 mm layer for 20 s. Elution of TEGDMA into 100% ethanol, a 75% ethanol/water solution, and distilled water was studied. The TEGDMA conce...

paratus is the dimension of the elution cham ber; if a large chamber is employed, dilution of solute occurs thus resulting in broadening of the elution patterns, while with a narrow chamber elution is frequently interrupted by the swelling of gel during operation. In many cases, either upward or downward elution has been employed and this leads to com plication of the apparatus. This communi ca...

Introduction: Composite resins have excellent mechanical properties, including fast polymerization,aesthetic quality, easy handling, and the ability to adhere enamel surfaces. However, there are alsosome disadvantages from this material, one of them is residual monomers. Bulk-fill composite areavailable in sculptable (solid) flowable (liquid) form. Most resin matrix aromatic oraliphatic acrylat...