Results 41 to 50 of about 7,059 (228)
Effect of exposure time vs. irradiance on knoop hardness of dental composites
Materials Research, 2006 A comparison was made of the hardness of Z250 and Esthet-X composites light cured with different light sources. Cavities (3 mm diameter x 6 mm deep) were prepared in 240 bovine incisors. The composite was bulk inserted and light-cured using halogen light,
Américo Bortolazzo Correr +5 more
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Mechanical and elastic properties of new silicon nitride ceramics produced by cold isostatic pressing and free sintering [PDF]
, 2015 The mechanical and elastic properties of new silicon nitride fabricated by cold isostatic pressing and free sintering are considered. Young׳s modulus, Poisson׳s ratio and shear modulus of investigated ceramic were determined. An indentation technique for
Lukianova, O.
core +1 more source
Knoop Hardness of Self-Etch Adhesives Applied on Superficial and Deep Dentin
Journal of Dentistry, 2020 Statement of the Problem: Low pH of self-etch adhesives might cause suboptimal polymerization. Purpose: This study aimed to evaluate the effect of dentin depth (deep and superficial) on polymerization efficacy of two self-etch adhesives, with different
Maryam Firouzmandi, Shideh Khashaei
doaj
Temperature rise and Knoop hardness promoted by different light-curing units
Brazilian Dental Science, 2010 This study characterized the light emitted by a quartz-tungsten-halogen (QTH) and three light-emitting diode (LED) light curing units (LCUs) and investigated the temperature rise and composite hardness promoted by these sources.
Luis Felipe J. Schneider +4 more
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Effect of experimental heat treatment on mechanical properties of resin composites [PDF]
, 2009 The aim of this study was to verify the influence of an experimental heat treatment (170ºC/10 min) using a casting furnace on the mechanical properties (hardness and flexural strength) of 2 commercial direct resin composites (TPH Spectrum and Filtek P60)
LODOVICI, Edméa +5 more
core +1 more source
Hummingbird Feeders Can Provide eDNA for Detection of Nectar‐Feeding Bats
Environmental DNA, Volume 8, Issue 1, January–February 2026.This study monitors nectar‐feeding bats (Leptonycteris nivalis, Leptonycteris yerbabuenae, and Choeronycteris mexicana) through eDNA swabs of hummingbird feeders collected by citizen scientists. Using novel qPCR assays, we successfully detected L. yerbabuenae and C. mexicana in a grand majority of samples. Previously only known to occur in the U.S.
Anna L. Riley +5 more
wiley +1 more source
Effects of a bleaching agent on properties of commercial glass-ionomer cements [PDF]
Restorative Dentistry & Endodontics, 2018 ObjectivesThis study evaluated the effects of a bleaching agent on the composition, mechanical properties, and surface topography of 6 conventional glass-ionomer cements (GICs) and one resin-modified GIC.Materials and MethodsFor 3 days, the specimens ...
Fernanda Lúcia Lago de Camargo +4 more
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Microscopy Research and Technique, Volume 88, Issue 12, Page 3147-3155, December 2025.Gels containing EGCG adsorbed on mesoporous silica nanoparticles have a protective effect against dentin erosion. ABSTRACT This study evaluated the in situ anti‐erosive effect of gels containing epigallocatechin‐3‐gallate (EGCG) isolated and adsorbed on mesoporous silica nanoparticles (EGCG/MSN) on eroded dentin.
Helaine Cajado Alves +5 more
wiley +1 more source
Effect of different light curing units on Knoop hardness and temperature of resin composite
Indian Journal of Dental Research, 2009 Aim: To evaluate the influence of quartz tungsten halogen and plasma arc curing (PAC) lights on Knoop hardness and change in polymerization temperature of resin composite.
Guiraldo Ricardo +5 more
doaj
Effect of ageing and immersion in different beverages on properties of denture lining materials
Journal of Applied Oral Science, 2010 OBJECTIVES: To evaluate the color stability and hardness of two denture liners obtained by direct and indirect techniques, after thermal cycling and immersion in beverages that can cause staining of teeth.
Vanessa M. F. Leite +4 more
doaj +1 more source