different techniques have been introduced for the removal of ceramic brackets. since the early 1990s, lasers have been used experimentally for debonding ceramic brackets. the goal of this study is to give a comprehensive literature review on laser-aided ceramic bracket debonding. pubmed and google scholar databases were used to identify dental articles with the following combination of key word...

The potential of the tailings from Morille scheelite-bearing calc-silicate deposit as a commercial raw material for inert glass–ceramic was determined. Nucleation and crystal growth temperatures glass were studied. maximum nucleation rate parent are 612 °C 660 is at 776 1047 °C. At nepheline, wollastonite akermanite formed. In glasses treated higher temperature nepheline becomes unstable wollas...

The conceptualization of the notion of a system in systems engineering, as exemplified in, for instance, the engineering standard IEEE Std 1220-1998, is problematic when applied to the design of socio-technical systems. This is argued using Intelligent Transportation Systems as an example. A preliminary conceptualization of socio-technical systems is introduced which includes technical and soci...

compare the effect of different ceramic thicknesses on degree of conversion (dc) of 3 light-cured resin cements. methods: in this experimental in-vitro study, the degree of conversion of three light-cured resin cements, variolink veneer (ivoclar, liechtenstein), relyx veneer (3m espe, usa) and choice2 (bisco, usa) were evaluated beneath feldespatic ceramic discs (vita vmk master) with a same sh...

at present, story literature has achieved an extraordinary credit in terms of purposing the foremost and most orginal issues concerning to human as well as the rate of influence and attraction of reader; and this has led to serious attention and efforts made by critics and experts for conducting criticism and analysis on its constituent components and elements from different points of view. con...

Abstract Following the reviews of atomic-weight determinations and other cognate data in 2015, 2017, 2019 2021, IUPAC (International Union Pure Applied Chemistry) Commission on Isotopic Abundances Atomic Weights (CIAAW) reports changes standard atomic weights. The symbol A r °(E) was selected for weight an element to distinguish it from E a specific substance P, designated (E, P). CIAAW has cha...