Influence of different water types on the physical and mechanical properties of gypsum

Authors

  • Juliana dos Santos Proença Universidade Estadual de Londrina – UEL
  • Marcos Massahiro Suzuki Universidade Estadual de Londrina – UEL
  • Silvano Cesar da Costa Universidade Estadual de Londrina - UEL
  • Bruno Shindi Hirata Universidade Estadual de Londrina - UEL
  • Murilo Baena Lopes Universidade Estadual de Londrina – UEL
  • Edwin Fernando Ruiz Contreras Universidade Estadual de Londrina – UEL

DOI:

https://doi.org/10.20396/bjos.v14i3.8641288

Keywords:

Calcium sulfate, Water, Compressive strength, Dental prosthesis

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.

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Author Biographies

Juliana dos Santos Proença, Universidade Estadual de Londrina – UEL

Universidade Estadual de Londrina – UEL, School of Dentistry, Department of Restorative Dentistry, Londrina, PR.

Marcos Massahiro Suzuki, Universidade Estadual de Londrina – UEL

Universidade Estadual de Londrina – UEL, School of Dentistry, Department of Restorative Dentistry, Londrina, PR.

Silvano Cesar da Costa, Universidade Estadual de Londrina - UEL

Universidade Estadual de Londrina - UEL, Department of Statistics, Londrina, PR.

Bruno Shindi Hirata, Universidade Estadual de Londrina - UEL

Universidade Estadual de Londrina – UEL, School of Dentistry, Department of Restorative Dentistry, Londrina, PR.

Murilo Baena Lopes, Universidade Estadual de Londrina – UEL

Universidade Estadual de Londrina – UEL, School of Dentistry, Department of Restorative Dentistry, Londrina, PR.

Edwin Fernando Ruiz Contreras, Universidade Estadual de Londrina – UEL

Universidade Estadual de Londrina – UEL, School of Dentistry, Department of Restorative Dentistry, Londrina, PR.

Published

2015-10-22

How to Cite

1.
Proença J dos S, Suzuki MM, Costa SC da, Hirata BS, Lopes MB, Contreras EFR. Influence of different water types on the physical and mechanical properties of gypsum. Braz. J. Oral Sci. [Internet]. 2015 Oct. 22 [cited 2022 Oct. 1];14(3):199-203. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641288

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