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Influence of different water types on the physical and mechanical properties of gypsum
Proença, Juliana dos Santos; Suzuki, Marcos Massahiro; Costa, Silvano Cesar da; Hirata, Bruno Shindi; Lopes, Murilo Baena; Contreras, Edwin Fernando Ruiz.
  • Proença, Juliana dos Santos; Universidade Estadual de Londrina. School of Dentistry. Department of Restorative Dentistry. Londrina. BR
  • Suzuki, Marcos Massahiro; Universidade Estadual de Londrina. School of Dentistry. Department of Restorative Dentistry. Londrina. BR
  • Costa, Silvano Cesar da; Universidade Estadual de Londrina. Department of Statistics. Londrina. BR
  • Hirata, Bruno Shindi; Universidade Estadual de Londrina. School of Dentistry. Department of Restorative Dentistry. Londrina. BR
  • Lopes, Murilo Baena; Universidade Estadual de Londrina. School of Dentistry. Department of Restorative Dentistry. Londrina. BR
  • Contreras, Edwin Fernando Ruiz; Universidade Estadual de Londrina. School of Dentistry. Department of Restorative Dentistry. Londrina. BR
Braz. j. oral sci ; 14(3): 199-203, July-Sept. 2015. tab, graf
Article in English | LILACS, BBO | ID: lil-770537
ABSTRACT
Abstract Aim: To evaluate if gypsum mixed with different water types, with their different compositions influence the dimensional change, surface roughness and compressive strength of type IV and V gypsum specimens. Methods: Sixty specimens were fabricated from metal matrices and divided into six groups (n=10) according to the used type of gypsum and water: G1, G2 and G3 - type IV gypsum and tap, mineral and distilled water, respectively; G4, G5 and G6 - type V gypsum and tap, mineral and distilled water, respectively. Water/powder ratio followed the manufacturer's recommendations (19 mL/100 g) in all groups. The same specimens were used for all tests. A micrometer dial evaluated the dimensional change. The surface roughness of three random points was determined with a rugosimeter; a universal testing machine performed the compressive strength test. The data were subjected to analysis of variance (ANOVA). Results: There was no statistically significant difference (p>0.05) between the three types of water in the studied variables. There was statistically significant difference (p<0.05) between the gypsum mixes for the dimensional change variable. Conclusions: The different water types, with their different compositions, did not influence the analyzed physical and mechanical properties.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Calcium Sulfate / Water / Dental Prosthesis / Compressive Strength Language: English Journal: Braz. j. oral sci Journal subject: Dentistry Year: 2015 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Estadual de Londrina/BR

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Full text: Available Index: LILACS (Americas) Main subject: Calcium Sulfate / Water / Dental Prosthesis / Compressive Strength Language: English Journal: Braz. j. oral sci Journal subject: Dentistry Year: 2015 Type: Article Affiliation country: Brazil Institution/Affiliation country: Universidade Estadual de Londrina/BR