Results 181 to 190 of about 10,408 (230)

Bond strength of lithium disilicate to polyetheretherketone

The Journal of Prosthetic Dentistry, 2022
Polyetheretherketone (PEEK) is a high-performance polymer that is increasingly used in dentistry, for example, as a framework for implant-supported fixed complete dentures. One protocol calls for individual lithium disilicate crowns to be cemented on preparation-shaped retentive elements on the framework.
Ryan, Sloan, Wainscott, Hollis, Audrey, Selecman, Vinay, Jain, Antheunis, Versluis   +4 more
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Strength and flexibility of lithium disilicate bonded to polyetherketoneketone

The Journal of Prosthetic Dentistry, 2023
Polyetherketoneketone (PEKK) is a high-performance polymer gaining popularity in dentistry for the fabrication of crowns, fixed partial dentures, removable partial denture frameworks, and frameworks for implant-supported fixed complete dentures. Despite a lack of performance data, lithium disilicate crowns have been bonded to retentive elements in PEKK
Michelle K. Ruse, G. Ryan Sloan, Wainscott Hollis, Antheunis Versluis   +3 more
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Electronic structures of lithium metasilicate and lithium disilicate

Physical Review B, 1985
The electronic structures of lithium metasilicate (${\mathrm{Li}}_{2}$${\mathrm{SiO}}_{3}$) and lithium disilicate (${\mathrm{Li}}_{2}$${\mathrm{Si}}_{2}$${\mathrm{O}}_{5}$) are calculated using a first-principles orthogonalized linear combination of atomic-orbitals method.
, Ching, , Li, , Veal, , Lam
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Fractographic analysis of monolithic lithium disilicate crowns

Dental Materials, 2014
veneering ceramic with the ceramic core were observed, as well as lithium disilicate ceramic. On the contrary, no fractures of the zirconia occurred and weight losses were under the detection threshold (0.001 g). Conclusion: Monolithic zirconia crowns are more fatigue resistant than layered ones,whereas no significant differences were found ...
Borelli B., SORRENTINO, Roberto, Scherrer S., Ferrari M., Zarone F.   +4 more
openaire   +2 more sources

Crystallization of lithium metasilicate from lithium disilicate glass

Journal of Non-Crystalline Solids, 1995
The crystallization behavior of lithium disilicate glass powder heated in molten LiNO3 salt was investigated using X-ray diffraction techniques. Heat treatment at 500°C with LiNO3 molten salt caused a lithium metasilicate, Li2SiO3, crystal phase to appear after 5–96 h.
Jeffrey R. Jacquin, Minoru Tomozawa
openaire   +1 more source

Wear of lithium disilicate opposed by various ceramic materials

Journal of Esthetic and Restorative Dentistry, 2023
AbstractObjectivesTo compare volumetric wear of lithium disilicate against different ceramic (3 mol% yttria‐stabilized (3Y) zirconia, 5 mol% yttria‐stabilized (5Y) zirconia, lithium disilicate, porcelain and enamel antagonists).Materials and MethodsForty lithium disilicate (e.max CAD) specimens (n = 8/antagonist) were wet sanded to 1200grit SiC and ...
Krisha Shah, Nathaniel C. Lawson, Akram Sayed Ahmed, Bushra Nizami, Thomas J. Lawson, Edwin Kee, Amir H. Nejat   +6 more
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Sol-gel processing of lithium disilicate

Journal of Materials Science, 1995
Lithium disilicate (Li 2 Si 2 O 5 ) coatings were prepared by spin-coating alkoxide solutions on to substrates [Si, SiO 2 , polycrystalline (poly) Si, sapphire] and heating isothermally at 500-600°C. The effects of solution chemistry, coating thickness and substrate type on crystallization behaviour and microstructure development were investigated ...
P. Li, L. F. Francis
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Lithium Disilicate Glass Ceramics

2011
In this chapter, the best way to crystallize and process lithium disilicate glass ceramics for dental applications is discussed. In addition, the best way to modify the chemical composition and optimize the microstructure to achieve lithium metasilicate or lithium disilicate is assessed.
Emad El-Meliegy, Richard van Noort
openaire   +1 more source

The structure of metastable lithium disilicate, Li2Si2O5

Acta Crystallographica Section C Crystal Structure Communications, 1990
Cristallisation dans Pbcn avec a=5,683, b=4,784, c=14,648 A, z=4; affinement jusqu'a R=0,063. Cette structure, differente de celle du Li 2 Si 2 O 5 stable, est au contraire similaire a celle du Na 2 Si 2 O 5 -α. Elle consiste en feuillets infinis de silicate, composes de tetraedres de SiO 4 se partageant les sommets, les atomes de lithium etant ...
R. I. Smith, R. A. Howie, A. R. West, A. Aragón-Piña, M. E. Villafuerte-Castrejón   +4 more
openaire   +1 more source

Containerless processing of a lithium disilicate glass

Journal of Materials Science, 2007
Glasses of Li2O.2SiO2 (LS2), and LS2 doped with 0.001wt% platinum (LS2 + 0.001 wt% Pt) compositions were melted, cooled and reheated at controlled rates while levitated (containerless) inside an Electrostatic Levitator (ESL) furnace at the NASA Marshall Space Flight Center, Huntsville, AL. The experiments were conducted in vacuum (approximately 10(exp -
Ranasinghe, KS, Ray, CS, Day, DE, Rogers, JR, Hyers, RW, Rathz, T   +5 more
openaire   +1 more source