Dimensional stability of maxillary denture bases flasked with the RS tension system

Authors

  • Rafael L. X. Consani Department of Prosthodontics, Campinas University School of Dentistry
  • Saide S. Domitti Department of Prosthodontics, Campinas University School of Dentistry
  • Marcelo F. Mesquita Department of Prosthodontics, Campinas University School of Dentistry
  • Lourenço Correr Sobrinho Department of Dental Materials, Campinas University School of Dentistry,

DOI:

https://doi.org/10.20396/bjos.v2i4.8641666

Keywords:

Dimensional stability. Denture base. Acrylic resin stages

Abstract

This study verified the dimensional stability of maxillary denture bases flasked with the RS tension system, in relation to the Clássico acrylic resin stages, proportioned and manipulated according to manufacturer’s instructions. Fifteen maxillary wax bases were made and randomly assigned into 3 groups of 5 specimens according to the stringy, doughlike and rubbery stages of the acrylic resin. The dough of the resin was pressed in traditional metallic flasks with the aid of the RS tension system and submitted to moist heat curing cycle at 74°C for 9 hours. After the curing cycle, the flasks were allowed to cool slowly inside the curing water for 5 hours before the resin bases were removed from flasks, finished and fixed on stone casts with instantaneous adhesive. The resin base-stone cast sets were transversally sectioned into 3 sections and the base-stone gap measured at 5 points in each section. The results were submitted to ANOVA and Tukey’s test and showed that the stringy, doughlike and rubbery stages presented values with statistically significant difference (p<.05) on denture bases accuracy. The best results were observed in the doughlike stage pressing, following by the stringy and rubbery stages.

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Author Biographies

Rafael L. X. Consani, Department of Prosthodontics, Campinas University School of Dentistry

bachelor's at Odontologia from Universidade São Francisco (1998), master's at Clinical Odontology from Universidade Estadual de Campinas (2000) and doctorate at Clinical Odontology from Universidade Estadual de Campinas (2002). Has experience in Odontology, focusing on Odontology, acting on the following subjects: prótese total, resina acrílica, adaptação, rugosidade and dureza

Marcelo F. Mesquita, Department of Prosthodontics, Campinas University School of Dentistry

bachelor's at Odontologia from Universidade Estadual Paulista Júlio de Mesquita Filho (1990), master's at Odontology from Universidade Estadual de Campinas (1993) and doctorate at Clinical Odontology from Universidade Estadual de Campinas (1995). Has experience in Odontology, acting on the following subjects: prótese total, resinas acrílicas, desinfecção, titânio and dentes artificiais.

Lourenço Correr Sobrinho, Department of Dental Materials, Campinas University School of Dentistry,

Possui graduação em Odontologia pela Universidade Estadual de Campinas (1988), mestrado em Materiais Dentários pela Universidade Estadual de Campinas (1991) e doutorado em Odontologia (Reabilitação Oral) pela Universidade de São Paulo (1995). Atualmente é professor titular da Universidade Estadual de Campinas (UNICAMP). É membro do corpo editoral dos periódicos: Brazilian Dental J. e Revisor dos periódicos: Pesquisa Odontológica Brasileira, Journal of Biomaterials Applications, Materials Research, Brazilian Journal of Oral Sciences, Journal Biomedical Material Research B Appl Biomaterials, RPG. Revista de Pós-Graduação (USP), Journal of Applied Oral Science e Ciência Odontológica Brasileira.

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Published

2015-11-11

How to Cite

1.
Consani RLX, Domitti SS, Mesquita MF, Correr Sobrinho L. Dimensional stability of maxillary denture bases flasked with the RS tension system. Braz. J. Oral Sci. [Internet]. 2015 Nov. 11 [cited 2022 Aug. 18];2(4):152-5. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641666

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