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Showing 1 to 17 of 17 for “"Lithium Disilicate"”.
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Development of Lithium Disilicate Microstructure Graded Glass-Ceramic
… processing. The desired glass-ceramic was a lithium disilicate material that has a crystallization gradient across the sample, leading to functionally graded properties as a result of the microstructure gradient. Samples were prepared by melting and pouring glass at 1400°C, annealing at 400°C …
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Fabrication, Kinetics and Crystallography of Lithium Disilicate Glass-Ceramics
… focuses on three aspects of investigations on lithium disilicate glass-ceramics, namely, fabrication, kinetics, and crystallography. One of the objectives is to fabricate a high-strength glass-ceramic in complex lithium disilicate glass systems for dental restorative applications by means of …
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Crystallization of Lithium Disilicate Glass Using Variable Frequency Microwave Processing
The lithium disilicate (LS2) glass system provides the basis for a large number of useful glass-ceramic products. Microwave processing of materials such as glass-ceramics offers unique benefits over conventional processing techniques. Variable frequency microwave (VFM) processing is an advanced …
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Microstructural evolution and physical behavior of a lithium disilicate glass-ceramic
Background: Elucidating the lithium disilicate system like the popular IPS e.max® CAD (LS2), made specifically for Computer-Aided Design and Computer-Aided Manufacturing (CAD-CAM), as a function of temperature unravels new ways to enhance material properties and performance. Objective: To study the …
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Optical properties Of CAD-CAM lithium disilicate glass-ceramic in different firing temperatures and thicknesses
… emerging of digital dentistry, IPS e.max® CAD lithium disilicate (LD) glass-ceramic material has become one of the most popular esthetic restorative materials in digital assisted dental esthetic restoration. The mechanical and optical properties of this material have been investigated in …
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A Parametric Study on the Effects of External Stimuli on the Aqueous Dissolution of Lithium Disilicate Glass
… on the dissolution of glass. For this research lithium disilicate was leached in deionized water at multiple temperatures while microwave radiation, ultrasonication or flow conditions were also applied to the system. These results were then compared to static baseline to determine if these …
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Evaluation of survival and complication rates of monolithic lithium disilicate implant-supported single crowns. A systematic review and meta-analysis.
Σκοπός: Η παρούσα συστηματική ανασκόπηση και μετα-ανάλυση είχε ως στόχο την αξιολόγηση της μακροχρόνιας κλινικής απόδοσης, και συγκεκριμένα των ποσοστών επιβίωσης και επιπλοκών, των μονολιθικών επιμφυτευματικών μονήρων στεφανών από διπυριτικό λίθιο. Υλικά και Μέθοδοι: Πραγματοποιήθηκε αναζήτηση …
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The comparison of tensile strength of polycarboxylate cement among different surfaces of implant custom abutments
… design/computer-aided manufactured lithium disilicate crowns and implant abutments cemented with polycarboxylate cement. Material & Methods A master cast of a maxillary right central incisor single implant restoration from a clinical case was utilized to fabricate five samples of …
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Mechanical Behavior of Posterior Implant Supported Restorations
… materials, monolithic zirconia and monolithic lithium disilicate and using two crown designs, hybrid-abutment-crowns and hybrid-abutments with separate crowns. Thirty-two implants were embedded perpendicularly in an auto-polymerizing resin. Thirty-two implant-supported restorations simulating a …
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Evaluation of implant restoration retention on various custom abutment materials and surfaces
… grooves (Gr), and zirconia (Z). A total of 25 lithium disilicate crowns were fabricated and each crown was cemented to its corresponding abutment with non-eugenol temporary resin cement. With the use of a universal testing machine, the maximum tensile strength needed to dislodge the crown from …
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The Effect of Microwaves on Aqueous Corrosion of Glass
… to migration into foods or other materials. Lithium disilicate (Li2O-2SiO2) and commercial soda-lime glass were corroded using both conventional and microwave heating in this study. The results did not clearly show substantial differences in corrosion under the test conditions, but leave open …
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Comparison Of Vickers Hardness Between Dental Ceramics And Hybrid Materials
… each tested material: zirconia (Lava Ultimate), lithium disilicate (IPS e.max CAD), lithium silicate reinforced with zirconia (Celtra Duo CAD), dual polymer hybrid ceramic (Vita Enamic) and resin ceramic hybrid (VarseoSmile Crown Plus). Vickers indenter (Wilson VH3100, Buehler) was used to create …
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Evaluation of dental hygiene prophylaxis systems on dental implants: randomized clinical trial of changes in oral health status
… with feldspathic ceramic, zirconia, or lithium disilicate—were recruited and randomly assigned to one of the two treatment groups. Clinical parameters including probing pocket depth (PPD), bleeding on probing (BoP), and plaque index (PI) were recorded at baseline and at 6, 12, 18, and 24 …
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The effect of repetitive firing cycles on physical and optical properties of zirconia reinforced lithium silicate ceramics
… and flexural strength of zirconia-reinforced lithium silicate ceramics. Two zirconia-reinforced lithium silicate ceramics and one lithium disilicate glass-ceramic were tested. Blocks of all materials were sectioned into tiles with different thicknesses and subjected to up to five firing cycles …
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Aesthetic Result of Ceramic Restorations with Different Cements.
… (HT) (Ivoclar Vivadent, Schaan, Liechtenstein) lithium disilicate ceramic and 120 samples of VitaBlocs® Mark II (VITA Zahnfabrik, Bad Säckingen, Germany) feldspathic ceramic in colour A1 were obtained. The samples were cut with a thickness of 0,5mm and 0,8mm. For the simulation of the substrate, …