Results 221 to 230 of about 23,616 (256)

Effect of surface penetrating sealant on surface texture and microhardness of composite resins

Journal of Biomedical Materials Research, 2000
The application of Fortify (Bisco, Lombard, IL), an unfilled resin, to the surface of composite resin restorations is intended to fill in defects in the surface that persist despite polishing, improve marginal integrity, and increase these materials' resistance to abrasion.
M F, Bertrand, E, Leforestier, M, Muller, L, Lupi-Pégurier, M, Bolla   +4 more
openaire   +2 more sources

Determination of Vickers microhardness on porous silicon surfaces

Thin Solid Films, 2008
The Vickers microhardness values of two different sets of porous silicon layers were determined at applied load of 98 mN. The sets consisted of Boron-doped substrates anodized at diverse current densities for two different amounts of hydrofluoric acid (HF) in the etching solution.
M. Morales-Masis, A. Ramírez-Porras
openaire   +1 more source

Surface Microhardness and Flexural Strength of Colored Zirconia

Advanced Materials Research, 2010
The surface microhardness and flexural strength of colored zirconia were examined. Two groups of zirconia disks (1mm thick, 20mm in diameter) within 5 disks each were shading with the same coloring liquids IL2 (Vita Classic-scale) when another group of 5 disks measured in no color.
Qi Liu, Long Quan Shao, Ning Wen, Bin Deng   +3 more
openaire   +1 more source

Effect of shading the zirconia framework on biaxial strength and surface microhardness

Acta Odontologica Scandinavica, 2008
Zirconia ceramics for frameworks of fixed partial dentures can be color shaded to better match the shade of veneering porcelain. The aim of this study was to evaluate the effect of color shading the green-stage zirconia ceramic on some mechanical properties.Zirconia disks (diameter 19 mm, thickness 0.8 mm) were divided into 10 groups of 10 disks each ...
Jenni, Hjerppe, Timo, Närhi, Kaj, Fröberg, Pekka K, Vallittu, Lippo V J, Lassila   +4 more
openaire   +2 more sources

STRUCTURE AND MICROHARDNESS OF THE SURFACE AFTER COMBINED TREATMENT

Tekhnicheskiy servis mashin
The wear of the surface layer of parts of various mechanisms leads to the loss of their working properties. There is a need to replace worn parts or carry out repairs with the restoration of operational properties. To restore worn surfaces, the method of electrical contact welding of the tape is widely used.
Andrey Fomin, Nikolay Pankin, Petr Senin
openaire   +1 more source

Effect of Gutta-Percha Solvents on Surface Microhardness of IRM Fillings

Journal of Endodontics, 2000
Eighty identical samples of IRM were prepared and embedded in acrylic resin. The samples were polished, rinsed, and divided into experimental groups and controls, 10 specimens each. Each experimental group was treated for 1 or 5 min with one of the following gutta-percha solvents: chloroform, xylene, or halothane.
J, Moshonov, B, Peretz, K, Ben-Zvi, N, Cohenca, I, Rotstein   +4 more
openaire   +2 more sources

Surface microhardness of enamel after different home bleaching procedures

Dental Materials, 2007
The purpose of this study was to evaluate the influence of different home bleaching procedures on surface microhardness of human enamel.Among eight groups 192 incisors were distributed. The facial surface of each incisor was polished and baseline hardness of enamel (m0; Knoop) was assessed with a load of 1N for 30s. Subsequently, the enamel was treated
Catharina, Zantner, Nils, Beheim-Schwarzbach, Konrad, Neumann, Andrej M, Kielbassa   +3 more
openaire   +2 more sources

Effect of preheating and shade on surface microhardness of silorane‐based composites

Journal of Investigative and Clinical Dentistry, 2016
AbstractAimThe aim of the present study was to evaluate the effect of preheating and shade on the surface microhardness of silorane‐based composites.MethodsThree shades of two different types of composites were evaluated: a silorane‐based composite and a methacrylate‐based composite.
Marios, Theodoridis, Dimitrios, Dionysopoulos, Eugenia, Koliniotou-Koumpia, Pavlos, Dionysopoulos, Paris, Gerasimou   +4 more
openaire   +2 more sources

The effect of burnishing parameters on burnishing force and surface microhardness

The International Journal of Advanced Manufacturing Technology, 2005
According to the results obtained from the boundary condition study of the burnishing process, cylindrical polycrystalline diamond (PCD) tools have been designed and fabricated. We probe deeper in the burnishing process by comparing the mechanics of using cylindrical PCD tools to work on aluminium alloy and brass compared to turning.
Hongyun Luo, Jianying Liu, Lijiang Wang, Qunpeng Zhong   +3 more
openaire   +1 more source

[Measuring microhardness of laser exposed tooth surface].

Stomatologie der DDR, 1991
In principle it is possible to homogenize the enamel surface by melting structural elements with the continuous wave CO2 laser. Using the precision instrument NEOPHOT 2 (Carl Zeiss JENA) the microhardness of extracted laserexposed premolares were tested so as to clarify the functional strain capasity and the mechanical characteristics of laserexposed ...
R, Florin, C, Herrmann, W, Bernhardt
openaire   +1 more source