Charge exchange at the bulk heterojunctions of composites made by mixing single wall nanotubes (SWNTs) and polymers show potential for use in optoelectronic devices such as solar cells and optical sensors. The density/total area of these heterojunctions is expected to increase with increasing SWNT concentration but the efficiency of solar cell peaks at low SWNT concentrations. Most researchers ...

The aim of this work is to present the different components of the composites currently used in dentistry and furnish dentists with a basis that can provide criteria for choosing one or another to suit their therapeutic requirements. Most composites used in dentistry are hybrid materials, so-called because they are composed of polymer groups reinforced by an inorganic phase of glass fillers wit...

Tooth 16 showed a fractured mesial marginal ridge that was undermined by caries (Figure 1). Following the placement of a rubber dam, the tooth was prepared and a medium-sized Class-II cavity resulted (Figure 2). In order to achieve optimum adhesion to enamel, it is essential to prepare the enamel margins in such a way that the enamel prisms are obliquely cut. This entails bevelling of the verti...

Aim: to evaluate and compare surface properties (wettability, surface roughness and color) of paste bulk fill resin composite materials on baseline and after incubation in RedBull or Black coffee storage media and to find out if there is any change in these surface properties after 1 week and 1 month incubation. Materials and Methods: Three bulk-fill resin composites (Filtek bulk fill3M, X-traf...

OBJECTIVES Direct composite restorations are increasingly popular and a flowable bulk-fill base material (SDR, Dentsply) claims to minimise stress through a more flexible polymerisation process. This retrospective audit of restorations placed in general practice compares SDR based restorations with conventional composite restorations. METHODS Restorations were all placed by one operator using...

In this study evaluated the effect of different adhesive systems and resin composites on microtensile bond strength repairs using a bulk-fill composite. Ninety specimens were prepared half-hourglass mold composite Filtek Bulk Fill silicone matrix. Specimens randomly distributed in 9 experimental groups (n=10) according to [Universal Single Bond (SBU), Scotchbond Multipurpose Adhesive (SBMP), 2 ...