Production and characterization of feldspathic-muscovite glass composite for dental prosthesis
Abstract The principal objective of this studywas to produce and characterize a machinable glass ceramic containing muscovite-mica as the main crystalline phase to be used as a dental restorative material. The secondary objective was to evaluate the use of muscovite-mica to improve machinability and...
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Sociedade Brasileira de Pesquisa Odontológica
2025-08-01
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| Series: | Brazilian Oral Research |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242025000105100&lng=en&tlng=en |
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| author | Fernanda Paes de Figueiredo Costa PIETOSO Shirleny Fontes SANTOS Lucas Hian da SILVA Paulo Francisco CESAR |
| author_facet | Fernanda Paes de Figueiredo Costa PIETOSO Shirleny Fontes SANTOS Lucas Hian da SILVA Paulo Francisco CESAR |
| author_sort | Fernanda Paes de Figueiredo Costa PIETOSO |
| collection | DOAJ |
| description | Abstract The principal objective of this studywas to produce and characterize a machinable glass ceramic containing muscovite-mica as the main crystalline phase to be used as a dental restorative material. The secondary objective was to evaluate the use of muscovite-mica to improve machinability and generate a toughening mechanism in the experimental glass ceramic. After fine milling of a feldspathic glass frit was milled and then mixed with muscovite-mica, die-pressed, and sintered under vacuum at 850 to 1,150 °C. The resulting sintered composite was characterized by X-ray diffraction, scanning electron microscopy, and had its fracture toughness evaluated by micro-indentation. The results were as follows: (a) improved thermal stability of muscovite-mica crystals in the composite; (b) improved leucite crystallization in the feldspathic glass matrix by increasing sintering temperature in the studied range ; (c) the composites consisting of glass + 10% muscovite and glass + 20% muscovite sintered at 1,050°C presented fracture toughness values of 9.0 ± 1.2 and 8.4 ± 0.6 MPa.m1/2, respectively, which are higher than those found in the literature for glass ceramics. Feldspar frit blocks with addition of muscovite-mica (up to 20%) can be densified at temperatures between 1,050 and 1,150°C. This material was stable at a temperature substantially higher than the stability limit of pure muscovite and also showed indentation fracture toughness values greater than those reported in the literature for other glass ceramics. |
| format | Article |
| id | doaj-art-919596c4d0e5489bb8a7c7fb876135cc |
| institution | Kabale University |
| issn | 1807-3107 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj-art-919596c4d0e5489bb8a7c7fb876135cc2025-08-20T04:00:43ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1807-31072025-08-013910.1590/1807-3107bor-2025.vol39.066Production and characterization of feldspathic-muscovite glass composite for dental prosthesisFernanda Paes de Figueiredo Costa PIETOSOhttps://orcid.org/0000-0001-5315-1548Shirleny Fontes SANTOShttps://orcid.org/0000-0003-3443-132XLucas Hian da SILVAhttps://orcid.org/0000-0002-8277-7782Paulo Francisco CESARhttps://orcid.org/0000-0001-5834-105XAbstract The principal objective of this studywas to produce and characterize a machinable glass ceramic containing muscovite-mica as the main crystalline phase to be used as a dental restorative material. The secondary objective was to evaluate the use of muscovite-mica to improve machinability and generate a toughening mechanism in the experimental glass ceramic. After fine milling of a feldspathic glass frit was milled and then mixed with muscovite-mica, die-pressed, and sintered under vacuum at 850 to 1,150 °C. The resulting sintered composite was characterized by X-ray diffraction, scanning electron microscopy, and had its fracture toughness evaluated by micro-indentation. The results were as follows: (a) improved thermal stability of muscovite-mica crystals in the composite; (b) improved leucite crystallization in the feldspathic glass matrix by increasing sintering temperature in the studied range ; (c) the composites consisting of glass + 10% muscovite and glass + 20% muscovite sintered at 1,050°C presented fracture toughness values of 9.0 ± 1.2 and 8.4 ± 0.6 MPa.m1/2, respectively, which are higher than those found in the literature for glass ceramics. Feldspar frit blocks with addition of muscovite-mica (up to 20%) can be densified at temperatures between 1,050 and 1,150°C. This material was stable at a temperature substantially higher than the stability limit of pure muscovite and also showed indentation fracture toughness values greater than those reported in the literature for other glass ceramics.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242025000105100&lng=en&tlng=enCeramicsDental PorcelainGlassDental Prosthesis |
| spellingShingle | Fernanda Paes de Figueiredo Costa PIETOSO Shirleny Fontes SANTOS Lucas Hian da SILVA Paulo Francisco CESAR Production and characterization of feldspathic-muscovite glass composite for dental prosthesis Brazilian Oral Research Ceramics Dental Porcelain Glass Dental Prosthesis |
| title | Production and characterization of feldspathic-muscovite glass composite for dental prosthesis |
| title_full | Production and characterization of feldspathic-muscovite glass composite for dental prosthesis |
| title_fullStr | Production and characterization of feldspathic-muscovite glass composite for dental prosthesis |
| title_full_unstemmed | Production and characterization of feldspathic-muscovite glass composite for dental prosthesis |
| title_short | Production and characterization of feldspathic-muscovite glass composite for dental prosthesis |
| title_sort | production and characterization of feldspathic muscovite glass composite for dental prosthesis |
| topic | Ceramics Dental Porcelain Glass Dental Prosthesis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242025000105100&lng=en&tlng=en |
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