Influence of surface free energy of denture base and liner materials on Candida albicans biofilms

2014 ◽  
Vol 6 (2) ◽  
pp. 141-146 ◽  
Author(s):  
Wander J. da Silva ◽  
Cristiane Maria B. Leal ◽  
Flávia C. Viu ◽  
Letícia M. Gonçalves ◽  
Célia Marisa R. Barbosa ◽  
...  
Keyword(s):  
Free Energy ◽  
Candida Albicans ◽  
Surface Free Energy ◽  
Denture Base ◽  
Candida Albicans Biofilms

Plasma proteins in the acquired denture pellicle enhance substrate surface free energy and Candida albicans phospholipase and proteinase activities

2014 ◽  
Vol 6 (4) ◽  
pp. 273-281 ◽  
Author(s):  
William Custodio ◽  
Wander J. Silva ◽  
Adriana F. Paes Leme ◽  
Jaime A. Cury ◽  
Altair A. Del Bel Cury
Keyword(s):  
Free Energy ◽  
Candida Albicans ◽  
Surface Free Energy ◽  
Plasma Proteins ◽  
Substrate Surface

scholarly journals Influence of the Manufacturing Method on the Adhesion of Candida albicans and Streptococcus mutans to Oral Splint Resins

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1534
Author(s):  
Andrea Schubert ◽  
Ralf Bürgers ◽  
Franziska Baum ◽  
Oliver Kurbad ◽  
Torsten Wassmann
Keyword(s):  
Surface Roughness ◽  
Free Energy ◽  
Candida Albicans ◽  
Streptococcus Mutans ◽  
Surface Free Energy ◽  
Computer Aided Design ◽  
Pearson Correlation ◽  
Oral Diseases ◽  
Microbial Adhesion ◽  
Computer Aided

Microbial adhesion to oral splints may lead to oral diseases such as candidiasis, periodontitis or caries. The present in vitro study aimed to assess the effect of novel computer-aided design/computer-aided manufacturing (CAD/CAM) and conventional manufacturing on Candida albicans and Streptococcus mutans adhesion to oral splint resins. Standardized specimens of four 3D-printed, two milled, one thermoformed and one pressed splint resin were assessed for surface roughness by widefield confocal microscopy and for surface free energy by contact angle measurements. Specimens were incubated with C. albicans or S. mutans for two hours; a luminometric ATP assay was performed for the quantification of fungal and bacterial adhesion. Both one-way ANOVA with Tukey post hoc testing and Pearson correlation analysis were performed (p < 0.05) in order to relate manufacturing methods, surface roughness and surface free energy to microbial adhesion. Three-dimensional printing and milling were associated with increased adhesion of C. albicans compared to conventional thermoforming and pressing, while the S. mutans adhesion was not affected. Surface roughness and surface free energy showed no significant correlation with microbial adhesion. Increased fungal adhesion to oral splints manufactured by 3D printing or milling may be relevant for medically compromised patients with an enhanced risk for developing candidiasis.

scholarly journals Grapefruit seed extract effectively inhibits the Candida albicans biofilms development on polymethyl methacrylate denture-base resin

PLoS ONE ◽  
2019 ◽  
Vol 14 (5) ◽  
pp. e0217496
Author(s):  
Chiaki Tsutsumi-Arai ◽  
Kensuke Takakusaki ◽  
Yuki Arai ◽  
Chika Terada-Ito ◽  
Yusuke Takebe ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Polymethyl Methacrylate ◽  
Seed Extract ◽  
Denture Base ◽  
Base Resin ◽  
Grapefruit Seed Extract ◽  
Candida Albicans Biofilms ◽  
Denture Base Resin

Smectic A-Smectic B interface : faceting and surface free energy measurement

1989 ◽  
Vol 50 (24) ◽  
pp. 3527-3534 ◽  
Author(s):  
P. Oswald ◽  
F. Melo ◽  
C. Germain
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Energy Measurement ◽  
Smectic A

Examination of the lubricant storing and releasing ability of thermally sprayed surfaces

2011 ◽  
Vol 2 (2) ◽  
pp. 101-105
Author(s):  
L. Fazekas ◽  
Z. S. Tiba ◽  
G. Kalácska
Keyword(s):  
Free Energy ◽  
Surface Energy ◽  
Surface Free Energy ◽  
Essential Role ◽  
Index Number ◽  
Adhesion Ability ◽  
Thermally Sprayed ◽  
Proper Operation

Abstract The lubricant storing and releasing ability of the thermally sprayed surfaces plays an essential role in the proper operation of the components. In the case of porous sprayed surfaces the lubricant storing and releasing ability depends mainly on porosity and the surface energy (adhesion susceptibility). The adhesion ability can also be expressed indirectly with an index number that is by determining the surface free energy.

Molecular orientation of liquid aliphatic hydrocarbons on the surface and at the interface with water

1989 ◽  
Vol 54 (12) ◽  
pp. 3171-3186 ◽  
Author(s):  
Jan Kloubek
Keyword(s):  
Free Energy ◽  
Surface Free Energy ◽  
Molecular Orientation ◽  
Phase Changes ◽  
Aliphatic Hydrocarbons ◽  
Water Molecules ◽  
Free Energies ◽  
Dispersion Component ◽  
System Water ◽  
Orientation Of Molecules

The validity of the Fowkes theory for the interaction of dispersion forces at interfaces was inspected for the system water-aliphatic hydrocarbons with 5 to 16 C atoms. The obtained results lead to the conclusion that the hydrocarbon molecules cannot lie in a parallel position or be randomly arranged on the surface but that orientation of molecules increases there the ration of CH3 to CH2 groups with respect to that in the bulk. This ratio is changed at the interface with water so that the surface free energy of the hydrocarbon, γH, rises to a higher value, γ’H, which is effective in the interaction with water molecules. Not only the orientation of molecules depends on the adjoining phase and on the temperature but also the density of hydrocarbons on the surface of the liquid phase changes. It is lower than in the bulk and at the interface with water. Moreover, the volume occupied by the CH3 group increases on the surface more than that of the CH2 group. The dispersion component of the surface free energy of water, γdW = 19.09 mJ/m2, the non-dispersion component, γnW = 53.66 mJ/m2, and the surface free energies of the CH2 and CH3 groups, γ(CH2) = 32.94 mJ/m2 and γ(CH3) = 15.87 mJ/m2, were determined at 20 °C. The dependence of these values on the temperature in the range 15-40 °C was also evaluated.

scholarly journals Effect of calcination temperature on neptunium dioxide microstructure and dissolution

2020 ◽  
Vol 7 (12) ◽  
pp. 3869-3876
Author(s):  
Kathryn M. Peruski ◽  
Brian A. Powell
Keyword(s):  
Grain Size ◽  
Free Energy ◽  
Surface Area ◽  
Calcination Temperature ◽  
Surface Free Energy ◽  
Neptunium Dioxide

Solubility of neptunium dioxide decreases as microstructure grain size increases, likely due to decreasing surface free energy and surface area.

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