The purposes of this study were evaluate by energy dispersed X-ray (EDS) and scanning electron microscopy (SEM) the inorganic particles of three nanofilled composite resins, comparing particles sizes, shape and composition, and the filler weight content by thermogravimetric analyzes (TGA). Three composite resins classified as nanofilled were selected to this study: Esthet-X; Grandio; Filtek Sup...

The combined effect of filler networking and reduced chain mobility close to the filler interface on the dynamic-mechanical properties of elastomers is analyzed based on investigations of the relaxation dynamics of solution styrene butadiene rubber filled with different loadings of silica. Dynamic-mechanical and dielectric spectra are studied in a wide frequency and temperature range. For the c...

Bio-composites of oil palm empty fruit bunch (OPEFB) fibres and polycaprolactones (PCL) with a thickness of 1 mm were prepared and characterized. The composites produced from these materials are low in density, inexpensive, environmentally friendly, and possess good dielectric characteristics. The magnitudes of the reflection and transmission coefficients of OPEFB fibre-reinforced PCL composite...

OBJECTIVE Bacteria- and fungus-binding mesh traps and inactivates bacteria and fungus, which makes it interesting, alternative, and wound filler for negative pressure wound therapy (NPWT). The aim of this study was to compare pathogen-binding mesh, black foam, and gauze in NPWT with regard to granulation tissue formation and ingrowth of wound bed tissue in the wound filler. METHODS Wounds on ...

The testing effect is a well-known concept referring to gains in learning and retention that can occur when students take a practice test on studied material before taking a final test on the same material. Research demonstrates that students who take practice tests often outperform students in nontesting learning conditions such as restudying, practice, filler activities, or no presentation of...

During the COllrse of an inves tigation of differentlv compounded rubber-filler systems. it was obs;rved that specimens of the sarno composition som etimes showed large differences in their values of both dielectric constant and of diss ipa tion factor. Tho most likely explanation was that these electrical properties wero affected by the amount of flow in a given direcLion produced during manuf...

AIM To evaluate the biocompatibility of a resin-based endodontic filler (RealSeal) using the indirect cytotoxicity test. METHODOLOGY Human gingival fibroblasts were cultured ex vivo. Pellets of the materials to be tested were incubated for 24, 48, and 72 h at 37 degrees C under sterile conditions to obtain their eluates. The fibroblasts were exposed to either diluted (50%) or undiluted eluate...

BACKGROUND A novel soft tissue filler composed of polymethylmethacrylate (PMMA) microspheres suspended in a collagen gel matrix containing 0.3% lidocaine (ArteFill, Artes Medical, Inc.) was recently approved by the Food and Drug Administration for the correction of nasolabial folds. A randomized, multicenter, controlled pivotal trial performed in the United States established the safety and eff...

STUDY DESIGN Mechanical study of polymethylmetacrylate (PMMA) mixed with blood as a filler. PURPOSE An attempt was made to modify the properties of PMMA to make it more suitable for percutaneous vertebroplasty (PVP). OVERVIEW OF LITERATURE The expected mechanical changes by adding a filler into PMMA included decreasing the Young's modulus, polymerization temperature and setting time. These ...

In natural world, lignin is unique and the most abundant renewable carbon source after cellulose, therefore, more applications of adding commercial value of lignin are needed. Polylactic acid (PLA), which has the second highest consumption of bioplastic in the world, is a biodegradable composite with widely application in industry. A filler adding into PLA can decrease the cost of the composite...