This in vitro study compared the microleakage of Class V resin composite restorations at bevelled enamel/composite and dentin/composite interfaces following Er:YAG laser (pre-treatment modalities: laser-etching and/or acid-etching) or conventional preparation and acid-etch, in association with two resin composite formulations and their three-step adhesive system. Class V cavities with conventio...

introduction :the aim of this study was to evaluate and compare the in vitro effect of the erbium-doped yttrium aluminum garnet (er:yag) laser with different radiation distances and high-speed rotary treatment on the shear bond strength of flowable composite to enamel of human permanent posterior teeth . methods : freshly extracted human molar teeth with no caries or other surface defects were ...

Large panels of etched plastic, situated aboard the Skylab Space Station and inside Ohya quarry near Tokyo, have been used to set limits on fluxes cosmogenic particles. These plastic particle track detectors also provide best sensitivity for some heavy dark matter that interacts strongly with nuclei. We revisit prior bounds from Skylab, incorporate geometry-dependent thresholds, a halo velocity...

Investigation of surface recombination is an important area for infrared detectors as the demand smaller pixels increases. In this study, we use transient microwave reflectance to characterize minority carrier lifetime InAsSb nBn structures under three conditions: As-Grown, blanket Barrier-Etched, and SU-8 Passivated barrier-etched. A qualitative comparison these samples shows that decreases Ba...

Previously, a computationally efficient and geometrically accurate etching simulation was developed to compute contours of constant depth at different time steps [1]. Experimental verification of this early work has been established [2]. However, contours are not amenable to the analysis and design of microsystems, since it is often necessary to determine object interaction and mechanics in whi...