Results 61 to 70 of about 1,682 (219)

6‐Month Clinical Evaluation of Reduced Dentin Etching Time Using Universal Adhesives in Noncarious Cervical Lesions: A Double‐Blind Randomized Clinical Trial

Journal of Esthetic and Restorative Dentistry, EarlyView.
ABSTRACT Objectives To evaluate the effect of reduced dentin etching time on the clinical performance of two universal adhesive systems in noncarious cervical lesions (NCCLs). Methods A total of 144 NCCLs restorations were randomly placed in 36 participants according to four experimental groups: SUP5 (Scotchbond Universal Plus adhesive [pH ≈2.5–2.7 ...
Mario Felipe Gutiérrez, Natalia Amo‐Nicolás, Alondra Beniscelli‐Vásquez, Romina Aliaga‐Gálvez, Alessandro D. Loguercio   +4 more
wiley   +1 more source

Metallogenic age and hydrothermal evolution of the Huangyangshan graphite deposit in eastern Xinjiang, NW China: constraint from zircon geochronology and geochemistry

Frontiers in Earth Science
The Huangyangshan graphite deposit in the East Junggar region of Xinjiang Province is the world’s first documented graphite deposit hosted within an alkaline granite intrusion.
Xinhao Sun, Yunsheng Ren, Zhenjun Sun, Jingmou Li, Mengjia Huang   +4 more
doaj   +1 more source

Metamorphic or Igneous Zircon? Classification Through Rare Earth Elements, Machine Learning and Logistic Regression

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges, Chris Yakymchuk, Michael P. DiMaio, Timothy C. C. Lui, Anirudh Prabhu, Shaunna M. Morrison   +5 more
wiley   +1 more source

Paramagnetic hole centres in natural zircon and zircon colouration

European Journal of Mineralogy, 2012
Paramagnetic defect centres and their relation to variable types of colouration were studied for eleven natural zircon crystals from three localities in North Carolina (USA), Massif Central (France), and Ural Mountains (Russia) using electron paramagnetic resonance (EPR) and optical absorption spectroscopy.
Mathias Klinger, Ulf Kempe, Andreas Pöpl, Rolf Böttcher, Michael Trinkler   +4 more
openaire   +1 more source

Assessment of impact of a control die on marginal fidelity of milled zirconia crown copings for finishing and polishing

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study evaluated and compared the marginal fidelity of milled zirconia copings before and after finishing and polishing with and without a control die. Materials and Methods This prospective multicenter in vitro trial involved two methods regularly used in two clinics for hybrid and full‐digital workflows.
Marwan Al Akkad, John Sorensen, Omar Hamadah, Iva Voborna, Marek Matoušek, Radek Mounajjed   +5 more
wiley   +1 more source

Surface roughness, stainability, and translucency of an additively manufactured interim resin reinforced with a commercially available ceramic composite concentrate after coffee thermal cycling

Journal of Prosthodontics, EarlyView.
Abstract Purpose To compare the surface roughness (Ra), stainability, and translucency of a ceramic composite concentrate‐reinforced interim resin with its corresponding non‐reinforced formulation and with a ceramic‐filled resin indicated for definitive use after coffee thermal cycling.
Mustafa Borga Donmez, Nicolas Michel Rotter, Gabriela Panca Sabatini, Almira Ada Diken Türksayar, Hyung‐In Yoon, Burak Yilmaz   +5 more
wiley   +1 more source

Zircon

Southern Spaces, 2016
Robert Morgan reads the poem "Zircon" in Zirconia, North Carolina, recalling his uncles' experience of digging the crystalline mineral and pondering its ability to clock the long register of time.
openaire   +2 more sources

Adjustment of CAD–CAM crowns with and without a 3D‐printed model: Comparative study of marginal fit

Journal of Prosthodontics, EarlyView.
Abstract Purpose This study evaluated and compared the marginal fit of CAD–CAM zirconia crown copings with and without a 3D‐printed control model. Materials and Methods This prospective in vitro trial involved 30 zirconia crown copings made from the same STL file. These were divided into two groups.
Marwan Al Akkad, Bedirhan Savas Yigit, Iva Voborna, Vaclav Prokupek, Oluwafunmibi Fasanya, Thomas Salinas, Radek Mounajjed   +6 more
wiley   +1 more source

Feldspar Albitization With Implications for Reservoir Quality Evolution of Eocene Turbidite Sandstones in Offshore Espírito Santo Basin, Eastern Brazil

Journal of Petroleum Geology, EarlyView.
ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato, Luiz F. De Ros, Howri Mansurbeg   +2 more
wiley   +1 more source

Geochronology and Hf isotopic characteristics of detrital zircon from the miboshan formation in the eastern hexi corridor: implications for the relationship between the alxa block and the North China craton

Frontiers in Earth Science
This study presents U-Pb ages together with newly obtained systematic Hf isotopic data from detrital zircons of the Middle Ordovician Miboshan Formation in the eastern Hexi Corridor (northwestern China), aiming to constrain its provenance characteristics
Hongze Yang, Hongze Yang, Hongze Yang, Wenzhong Wu, Wenzhong Wu, Yu Ma, Yu Ma   +6 more
doaj   +1 more source