Effect of the mixing method on the dimensional stability of dental stones

Authors

  • Rubens Nisie Tango São Paulo State University (Unesp) – Institute of Science and Technology, São José dos Campos – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil. http://orcid.org/0000-0003-0946-1826
  • Diego Leonardo Aparecido Souza Private Office – São José dos Campos – SP – Brazil.
  • Lucas Hian da Silva Universidade Cidade de São Paulo – São Paulo – SP – Brazil. http://orcid.org/0000-0002-8277-7782
  • Tabata Prado Sato São Paulo State University (Unesp) – Institute of Science and Technology, São José dos Campos – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil. http://orcid.org/0000-0001-6472-8840
  • Alexandre Luiz Souto Borges São Paulo State University (Unesp) – Institute of Science and Technology, São José dos Campos – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil. http://orcid.org/0000-0002-5707-7565
  • Paula Carolina Komori de Carvalho São Paulo State University (Unesp) – Institute of Science and Technology, São José dos Campos – Department of Dental Materials and Prosthodontics – São José dos Campos – SP – Brazil. http://orcid.org/0000-0002-9411-5719

DOI:

https://doi.org/10.14295/bds.2018.v21i4.1616

Abstract

The aim of this study was to evaluate the influence of mixing method and the empiric water/powder ratio on the dimensional change of two types of dental stones (type III and type IV) at different setting times: baseline, loss of brightness, initial and final setting (1/4 and 1pound Gilmore´s needle, respectively) and, after 48 hours at 37°C. Five mixing methods were used: Gc – manufacturer´s recommendation, G1 – weighed powder/ empiric water volume and powder on water, G2 - weighed powder/ empiric water volume and water on powder, G3 – empiric powder volume, graduated water and powder on water, G4 - empiric powder volume, graduated water and water on powder. The linear expansion was measured according to ISO 6873. The expansion values (x10-2mm) were analyzed by Two-way ANOVA and Tukey HSD test (?=0.05). For type III, the results showed significance for both factors and for interaction; for type IV, only the time were significant (p<0.05). Limited by methodology, it could be concluded that both dental stones expanded more than the recommended by ISO. The expansion of type III was dependent on the mixing method, and once correct consistency is reached with type IV, there is no influence of mixing method on dimensional stability.

Keywords

Gypsum; Dental stones; Expansion behavior.

Downloads

Download data is not yet available.

Downloads

Published

2018-10-24

How to Cite

1.
Tango RN, Souza DLA, da Silva LH, Sato TP, Borges ALS, de Carvalho PCK. Effect of the mixing method on the dimensional stability of dental stones. BDS [Internet]. 2018 Oct. 24 [cited 2025 Aug. 21];21(4):432-6. Available from: https://ojs.ict.unesp.br/index.php/cob/article/view/1616

Issue

Vol. 21 No. 4 (2018): Oct. - Dec. / 2018 - Published October 2018

Section

Clinical or Laboratorial Research

License

Brazilian Dental Science uses the Creative Commons (CC-BY 4.0) license, thus preserving the integrity of articles in an open access environment. The journal allows the author to retain publishing rights without restrictions.

=================

COPYRIGHT TRANSFER AND RESPONSIBILITY STATEMENT
 (PDF)

For all articles published in the BDS journal, copyright is retained by the authors. Articles are licensed under an open-access Creative Commons CC BY 4.0 license, meaning that anyone may download and read the paper for free. In addition, the article may be reused and quoted, provided that the original published version is cited. These conditions allow for maximum use and exposure of the work while ensuring that the authors receive proper credit. All metadata associated with published articles is released under the Creative Commons CC0 Universal Public Domain Dedication.

Before the submission, authors must obtain permission to reproduce any published material (figures, schemes, tables, or any extract of a text) that does not fall into the public domain or for which they do not hold the copyright. Permission should be requested by the authors from the copyright holder (usually the Publisher, please refer to the imprint of the individual publications to identify the copyright holder).

The authors hereby attest that the study is original and does not present manipulated data, fraud, or plagiarism. All names listed made a significant scientific contribution to the study, are aware of the presented data, and agree with the final version of the manuscript. They assume complete responsibility for the ethical aspects of the study.

This text must be printed and signed by all authors. The scanned version should be submitted as supplemental file during the submission process.

Most read articles by the same author(s)

<< < 1 2 3 4 > >>