The shear bond strength of composite resin to porcelain was investigated to optimize variables for bonding porcelain laminate veneers. Scanning electron microscopy was initially used to examine the surface configuration of porcelain prepared under various conditions. A factorial experiment was undertaken to determine the effects of three different bonding methods on both etched and non-etched p...

The aim of this study was to establish the early odontoblastic layer response and quantitatively to estimate the number of odontoblasts after cavity preparation with and without acid etching. Half of 56 cavities prepared on rats' first upper molars were acid etched. Qualitative and morphometric analyses were made on histological and ultrathin sections 5 min, 6 h, 24 h and 72 h post-operatively....

In this paper we present a high gain dual-polarized planar etched slot array for use in wireless local area networks (WLAN). Two sets of four collinear slots are used as radiators for each polarization. Each set of four collinear slots is constructed as a centre-fed long slotline, with etched crossovers to split the slotline in four resonant and in-phase half-wavelength slots. A reflector etche...

Background and Aim: Several methods are available for intraoral repair of chipped porcelain restorations by composite resin. Also, there is still controversy regarding the best method of porcelain repair in terms of bond strength and cost effectiveness. This study aimed to compare three methods of porcelain surface treatment on shear bond strength (SBS) of composite to porcelain. Materials a...

When a swift ion is slowed down through a plastic detector it creates a latent track. In nuclear track detectors, this latent track can be specifically etched by an appropriate chemical solution. This enlargement process is due to a higher etch velocity (VT) along the ion's path than in the non-damaged part of the detector. The etched track velocity is definitely linked to the damage created by...

The gap between a metal crown and an abutment tooth often leads to troubles such as secondary caries, pulpitis, periodontitis and so on. We expected that newly developed adhesive resins which adhere both dental alloy and tooth structure can minimize such troubles if they were used as setting materials of prosthetics. In this study, the degree of marginal leakage of adhesive resins was compared ...

Grooves on the surface of the plasmalemma(plasma membrane) of frozen-etched yeast cells have been shown by many investigators (1, 10, 12) . Necas et al. (13) showed interconnected grooves on the surface of frozen-etched Saccharomyces cerevisiae protoplasts, but such structures could not be so effectively demonstrated in frozen-etched protoplasts prefixed in glutaraldehyde . Structures comparabl...

Properties of GaN surfaces etched by bias-assisted photoenhanced electrochemical (PEC) oxidation in deionized water and subsequent removal of the oxidized material are investigated using Schottky diodes fabricated on etched surfaces. It is demonstrated that with a short anneal at 700 C after removal of the oxide, it is possible to obtain a low damage surface with near ideal breakdown and capaci...

Fabrication of microporous structures for the anode of a thin film solid oxide fuel cell (SOFC(s)) using controlled etching process has led us to increased power density and increased cell robustness. Micropores were etched in the nickel anode by both wet and electrochemical etching processes. The samples etched electrochemically showed incomplete etching of the nickel leaving linked nickel isl...

Neutron transmission imaging is a technique ideally suited for imaging various flow phenomena in consolidatedporous media because the porous matrix is virtually transparent to thermal neutrons. Hydrogen-containing fluids, however, provide a contrast in the image due to their large thermal neutron cross-sections. This technique has uncovered new phenomena in the study of dissolution andprecipita...