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Fracture toughness of experimental mica-based glass-ceramics and four commercial glass-ceramics restorative dental materials. 2019

Thapanee Srichumpong, and Pimnida Phokhinchatchanan, and Noparat Thongpun, and Duangrudee Chaysuwan, and Kallaya Suputtamongkol
Department of Materials Engineering, Faculty of Engineering, Kasetsart University.

The mica-based glass-ceramics were prepared in the SiO2-Al2O3-MgO-MgF2-SrCO3-CaCO3-CaF2-P2O5 glass system. There were four mica-based glass-ceramics produced in this study according to the pigment added (CeO2 or Pr-ZrSiO4/Fe-ZrSiO4) and crystallization time (5-35 min). Four dental glass-ceramics, which were leucite-based, lithium disilicate-based and two zirconia reinforced lithium silicate ceramics, were also tested. The phase identification of mica-based glass-ceramics was performed using an X-ray diffractometer. The fracture toughness (KIC) was determined using the fractographic analysis approach. The one-way ANOVA was used to analyze the significant differences among the obtained KIC values at a=0.05. The results from the phase analysis showed that the mica glassceramics consisted of calcium-mica, fluorapatite and strontiumapatite. The KIC of mica-based glass-ceramics ranged between 1.36 to 1.53 MPa•m1/2 which were superior to only that of a leucite-based glass-ceramic. The shade and translucency of mica-based glassceramics appeared to be acceptable for dental application when compared with other dental glass-ceramics.

UI MeSH Term Description Entries
D008422 Materials Testing The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility. Biocompatibility Testing,Biocompatible Materials Testing,Hemocompatibility Testing,Testing, Biocompatible Materials,Testing, Hemocompatible Materials,Hemocompatibility Testings,Hemocompatible Materials Testing,Materials Testing, Biocompatible,Materials Testing, Hemocompatible,Testing, Biocompatibility,Testing, Hemocompatibility,Testing, Materials,Testings, Biocompatibility
D002516 Ceramics Products made by baking or firing nonmetallic minerals (clay and similar materials). In making dental restorations or parts of restorations the material is fused porcelain. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Boucher's Clinical Dental Terminology, 4th ed) Ceramic
D003764 Dental Materials Materials used in the production of dental bases, restorations, impressions, prostheses, etc. Dental Material,Material, Dental,Materials, Dental
D003776 Dental Porcelain A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992) Porcelain,Porcelain, Dental,Dental Porcelains,Porcelains,Porcelains, Dental
D006244 Hardness The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property. Hardnesses
D000538 Aluminum Silicates Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed) Aluminum Silicate,Silicate, Aluminum,Silicates, Aluminum
D012822 Silicon Dioxide Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid. Silica,Aerosil,Aerosil 380,Cristobalite,Quso G-32,Quso G32,Tridymite,380, Aerosil,Dioxide, Silicon,G32, Quso,Quso G 32

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