Results 301 to 310 of about 1,551,640 (337)

Changes in Degree of Conversion and Microhardness of Dental Resin Cements

Operative Dentistry, 2010
SUMMARY There are few studies available on the post-light activation or post-mix polymerization of dental resin cements as a function of time. This in vitro study evaluated the successive changes in the degree of conversion (DC) and microhardness during polymerization of six commercial resin cements (light-cured [Choice 2, RelyX Veneer ...
Yong Li, Yan, Young Kyung, Kim, Kyo-Han, Kim, Tae-Yub, Kwon   +3 more
openaire   +2 more sources

Effect of Polymer Degree of Conversion on Streptococcus mutans Biofilms

Macromolecular Bioscience, 2012
AbstractBiofilm–material interactions are increasingly recognized as critical to success of some materials/devices and failure of others. We use a model system of dental monomers, salivary pellicles, and oral biofilms to demonstrate for the first time that degree of conversion of cross‐linked dimethacrylate polymers alters biofilm metabolic activity ...
Alison M, Kraigsley, Kathy, Tang, Katrice A, Lippa, John A, Howarter, Sheng, Lin-Gibson, Nancy J, Lin   +5 more
openaire   +2 more sources

Polymerization kinetics of oligoesteracrylates at high degrees of conversion

Polymer Science U.S.S.R., 1967
IF [1, 2] IT was reported tha t the polymerization kinetics of oligoesteracrylates t (OEA) is a diffusion-controlled process even at low degrees of conversion (G< 1%). At these G the influence of the physical properties (viscosity) of the reaction system on the apparent reactivity of OEA consists mainly in the recombination of polymer radicals, the ...
G.V. Korolev, B.R. Smirnov, L.A. Zhil'tsova, L.I. Makhonina, N.N. Tvorogov, A.A. Berlin   +5 more
openaire   +1 more source

Effect of temperature on composite polymerization stress and degree of conversion

Dental Materials, 2014
To test the following hypotheses: (1) degree of conversion (DC) and polymerization stress (PS) increase with composite temperature (2) reduced light-exposure applied to pre-heated composites produces similar conversion as room temperature with decreased PS.Composite specimens (diameter: 5mm, height: 2mm) were tested isothermally at 22°C (control), 40°C,
Fernanda C, Calheiros, Márcia, Daronch, Frederick A, Rueggeberg, Roberto R, Braga   +3 more
openaire   +2 more sources

Color stability, opacity and degree of conversion of pre-heated composites

Journal of Dentistry, 2011
To assess color stability and opacity associated with the degree of conversion of a pre-heated nanohybrid composite (Tetric N-Ceram, Ivoclar/Vivadent, Schaan, Liechtenstein).Twenty-seven specimens were prepared (n=9) using a Teflon matrix following storage of compules containing the composite at temperatures of 8°C, 25°C or 60°C.
Fabrício Mariano, Mundim, Lucas da Fonseca Roberti, Garcia, Diogo Rodrigues, Cruvinel, Fabrício Augusto, Lima, Luciano, Bachmann, Fernanda de Carvalho Panzeri, Pires-de-Souza   +5 more
openaire   +2 more sources

Degree of conversion of pulsed laser cured composites

1996
Clinical performance of visible-light curing composites is greatly influenced by the quality of photopolymerization. Some drawbacks of currently used photopolymerizhation units necessitate the search for new light sources. In this study, comparison was made between the degree of conversion of two hybrid composites (Tetric, Vivadent, Schaan ...
Meniga, Andrej, Šutalo, Jozo, Ristić, Mira, Tarle, Zrinka, Pichler, Goran   +4 more
openaire   +1 more source

Hardness and degree of conversion of posterior packable composites.

Operative dentistry, 2005
Knoop microhardness and the degree of conversion of three packable composites (SureFil, Alert and Solitaire), a microfil composite (Heliomolar), a microhybrid composite (Herculite) and an indirect laboratory-processed composite (Belleglass) were evaluated as a function of distance from the irradiated surface.
Lisa A, Knobloch, Ronald E, Kerby, Nancy, Clelland, Jeffrey, Lee   +3 more
openaire   +1 more source

Degree of conversion of experimental bioactive glass-containing composites

2017
To investigate the degree of conversion (DC) of experimental composites containing bioactive glass (BG). These composites were previously shown to be capable of precipitating a hydroxyapatite layer on the material surface, which may aid in the prevention of secondary caries.
Par, Matej, Spanovic, Nika, Gamulin, Ozren, Marovic, Danijela, Mandic, Visnja, Tarle, Zrinka   +5 more
openaire   +2 more sources

Conversion of Diplomas to Degrees

Physiotherapy, 1988
openaire   +2 more sources

Degree of Vinyl Conversion in Experimental Bioactive Composites

2008
Objectives: The aim of this study was to asses the effect of resin composition and curing time on degree of vinyl conversion (DVC) attained in experimental composites based on amorphous calcium phosphate (ACP). Bioactivity of ACP composites instigates from their ability to release calcium and phosphate ions in aqueous ambience which may aid in ...
Knežević, Alena, Tarle, Zrinka, Škrtić, Drago, Ristić, Mira, Marović, Danijela, Janković, Bernard   +5 more
openaire   +1 more source