Results 191 to 200 of about 10,408 (230)

Alteration of the intaglio surface of lithium disilicate glass-ceramic

The Journal of Prosthetic Dentistry, 2019
Clinical adjustment of a lithium disilicate glass-ceramic (LDGC) restoration may necessitate its return to the laboratory for additional firing. Evidence of how the intaglio surface should be re-etched after internal adjustment, or after refiring, is lacking.The purpose of this in vitro study was to investigate the effects of different sequences of ...
Catherine M. Gorman, Daithi de Faoite, David Flannery, Marta Ratajczak, Tomás Kelly, Kenneth T. Stanton   +5 more
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In vitro cytotoxic response to lithium disilicate dental ceramics

Dental Materials, 2008
The use of lithium disilicate dental ceramics is increasing in dentistry and previous reports have suggested that they may have greater biological risks than previously thought. We tested a hypothesis that composition and processing influence the biological properties of these ceramics.The cytotoxicity of two machined and three pressed lithium ...
Brackett, Martha Goël, Lockwood, Petra E., Messer, Regina L W., Lewis, Jill B., Bouillaguet, Serge, Wataha, John C.   +5 more
openaire   +3 more sources

Metastable phases in lithium disilicate glasses

Journal of Non-Crystalline Solids, 1997
Abstract This article deals with crystal nucleation in glass, with special emphasis on new findings about metastable phase formation in lithium disilicate glass (LS2) and its effects on crystallization of the stable LS2 crystal phase. The early crystallization stages of slightly sub-stoichiometric LS2 glasses were probed with SAXS and selected area ...
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Morphogenesis in lithium disilicate glass

2018
This thesis was digitised by the British Library from microfilm. You can acquire a single copy of this thesis for research purposes by clicking on the padlock icon on the thesis file. Please be aware that the text in the supplied thesis pdf file may not be as clear as text in a thesis that was born digital or digitised directly from paper due to the ...
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Comparison of the mechanical properties of translucent zirconia and lithium disilicate

The Journal of Prosthetic Dentistry, 2018
Three mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) possesses excellent mechanical properties but is relatively opaque. Five mol% yttria-stabilized zirconia polycrystal (5Y-ZP) offers improved translucency, but many of its clinical properties have not been compared with those of 3Y-TZP and lithium disilicate.The purpose of this in ...
Sung Joon Kwon, Nathaniel C. Lawson, Edward E. McLaren, Amir H. Nejat, John O. Burgess   +4 more
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Adherence of Streptococcus mutans on lithium disilicate porcelain specimens

The Journal of Prosthetic Dentistry, 2015
Streptococcus mutans can adhere at restored tooth margins to cause recurrent caries. Limited information about surface quality and bacterial adherence is available for lithium disilicate ceramic materials.The purpose of this in vitro study was to investigate how bacterial adherence is influenced by commercially available preparations of lithium ...
Diane T, Vo, Dwayne, Arola, Elaine, Romberg, Carl F, Driscoll, Mary Ann, Jabra-Rizk, Radi, Masri   +5 more
openaire   +2 more sources

TLD characteristic of glass, feldspathic and lithium disilicate ceramics

Luminescence, 2019
AbstractThermoluminescence (TL) emission of dental ceramics could be potentially used for retrospective dosimetry purposes as this allows a quick and reliable dose assessment in case of nuclear accident or bad use of a nuclear attack. This paper reports on the chemical and luminescence characterization of glass, feldspathic and lithium disilicate glass
Esme Isik, Huseyin Toktamis
openaire   +2 more sources

An In Vitro Investigation Into the Wear Effects of Lithium Disilicate, Zirconia, and Zirconia Reinforced Lithium Disilicate Ceramic Materials on an Opposing Material

Journal of Esthetic and Restorative Dentistry
ABSTRACT Objective The aim of the present study was to evaluate the surface roughness and wear effect of three different ceramic materials. Materials and Methods Thirty ceramic discs (10/group ...
Majd Y. U'wais, Ahed Al‐Wahadni, Abedelmalek K. Tabnjh   +2 more
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WEAR OF LITHIUM DISILICATE OPPOSING ZIRCONIA, LITHIUM DISILICATE, AND PORCELAIN.

2023
Pranit Bora, Lawson, Nathaniel
openaire   +1 more source

Er:YAG laser debonding of zirconia and lithium disilicate restorations

The Journal of Prosthetic Dentistry
Yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) restorations of different formulations are being used increasingly in monolithic form for a range of clinical applications. Using rotary instruments to remove such restorations for any purpose is challenging, but they can be removed conservatively with erbium lasers.
Sama Suliman, Taiseer A. Sulaiman, Janina Golob Deeb, Awab Abdulmajeed, Aous Abdulmajeed, Timo Närhi   +5 more
openaire   +2 more sources