Results 61 to 70 of about 343,283 (222)

Surface characterization of ceramic brackets: A multitechnique approach

American Journal of Orthodontics and Dentofacial Orthopedics, 1994
The purpose of this study was to investigate the microstructure and bonding mechanisms for four types of ceramic brackets by using information from several methods. Two of the bracket types provided exclusively micromechanical retention as a bonding mechanism, with the use of microspheres or microcrystals to achieve a rough structure for the bracket ...
ELIADES, T, LEKKA, M, ELIADES, G, BRANTLEY, WA   +3 more
openaire   +3 more sources

Perspectives of High‐Resolution Mass Spectrometry in Soil Science

Journal of Plant Nutrition and Soil Science, EarlyView.
ABSTRACT Soil biogeochemical research requires specific, sensitive, and accurate methods to identify and quantify organic molecules in order to trace biochemical processes and assess element cycling in complex, heterogenous systems. High‐resolution mass spectrometry (HRMS) has evolved into a transformative tool for unraveling the complex chemical ...
Bruno Glaser, Tobias Bromm, Klaus Kaiser, Arthur Gross, Carsten Simon, Snežana Maletić, Ines Mulder, Oliver J. Lechtenfeld, Sören Thiele‐Bruhn, Ivy Notterpek, Callum Banfield, Michaela A. Dippold   +11 more
wiley   +1 more source

Intercomparison of carbon‐13 and carbon‐14 tracer approaches for estimating marine calcification and net primary production

Limnology and Oceanography: Methods, EarlyView.
Abstract Accurate measurements of phytoplankton net primary production (NPP) and calcification are essential for quantifying marine carbon cycling, yet in situ calcification rates remain poorly constrained. We compared 13C‐ and 14C‐based tracer methods for NPP in laboratory cultures of the diatom Chaetoceros tenuissimus and the coccolithophore ...
Chloe L. Smith, Austin Grubb, Kay D. Bidle, Kimberlee Thamatrakoln, Adam V. Subhas   +4 more
wiley   +1 more source

Pain and removal force associated with bracket debonding: a clinical study

Journal of Applied Oral Science, 2021
Objective: Pain is a problem during bracket removal, and more comfortable treatment is needed. This study examined the association of pain with the removal force required for ceramic brackets, compared with metal and plastic brackets, to determine which ...
Narumi Nakada, Yasuki Uchida, Mizuki Inaba, Ryo Kaetsu, Natsuo Shimizu, Yasuhiro Namura, Mitsuru Motoyoshi   +6 more
doaj   +1 more source

Frictional Resistance of Three Types of Ceramic Brackets [PDF]

Journal of Oral and Maxillofacial Research, 2013
To investigate the static frictional resistance at the bracket/archwire interface in two recently introduced bracket systems and compare them to conventional ceramic and conventional metal bracket systems. Three variables were considered including the bracket system, archwire type and archwire angulation.Four bracket systems were tested in vitro: Self ...
Williams, Claire L., Khalaf, Khaled
openaire   +4 more sources

High‐Temperature Corrosion of Unpassivated Carbon Steel in Simulated Boiler Water: Electrochemical Thresholds and Mechanisms for Chloride and Sulphate Contamination

Materials and Corrosion, EarlyView.
Through a combination of in situ electrochemical corrosion rate measurements and FactSage thermochemistry modeling, chloride and sulphate ions were found to influence the corrosion of carbon steel in high‐temperature boiler water through distinct mechanisms: chloride acidifies the solution, raising iron solubility, while sulphate leaves solubility ...
Benjamin A. Loder, William G. Cook
wiley   +1 more source

Comparison of Frictional Resistance between Monocrystalline and Polycrystalline Brackets in Conventional and Self Ligating Ceramic Brackets using Different Archwire Alloys [PDF]

, 2016
BACKGROUND : Friction is the one of the main factor that influences the sliding mechanics. In this study the frictional resistance generated by monocrystalline and polycrystalline brackets in conventional and self ligating ceramic brackets has been ...
Bibin Ninan, Mathew
core  

A Simple Rheology‐Based Framework for Selecting Printing Parameters in Extrusion‐Based Hydrogel Additive Manufacturing

Polymer Engineering &Science, EarlyView.
An open analytical framework converts standard rheological measurements directly into the complete extrusion field and slicer‐ready printing parameters for Piston driven printers, enabling rapid operational window of printability in direct ink writing without CFD or machine learning. ABSTRACT Predicting whether a gel formulation will print successfully
Thiago M. C. Rodrigues, João V. R. C. dos Santos, Nicole P. Martins, Rossana Mara da Silva Moreira Thiré   +3 more
wiley   +1 more source

Comparison of the static frictional resistance and surface topography of ceramic orthodontic brackets: an in vitro study

Australasian Orthodontic Journal, 2017
The aim of this study was to investigate the frictional resistance (FR) and surface topography of newly available polycrystalline alumina (PCA) ceramic brackets characterised by a yttria-stabilised zirconia (YSZ) coating of the slots, compared with ...
AlSubaie Mai, Talic Nabeel
doaj   +1 more source

Local and Systemic Risk Factors of Dental Biofilm‐Induced Gingivitis and Their Control: A Systematic Review

Journal of Clinical Periodontology, EarlyView.
ABSTRACT Objectives To identify local and systemic risk factors/indicators for dental biofilm‐induced gingivitis (DB‐GI) and to summarize evidence for their control. Methods A systematic review was undertaken following Preferred Reporting Items for Systematic Review and Meta‐Analyses (PRISMA) guidelines and divided into PECOTS and PICOTS questions ...
M. Gosset, E. Chatzopoulou, L. Detzen, K. Jepsen, P.‐M. Jervøe‐Storm, S. Jepsen, R. Cosgarea   +6 more
wiley   +1 more source