Effect of cervical relining of acrylic resin copings on the accuracy of stone dies obtained using a polyether impression material

Authors

  • André Tomazini Gomes de Sá State University of Londrina; Londrina School of Dentistry; Discipline of Restorative Dentistry
  • César Antunes de Freitas University of São Paulo; Bauru School of Dentistry; Discipline of Dental Materials
  • Fátima Cristina de Sá State University of Londrina; Londrina School of Dentistry; Discipline of Restorative Dentistry
  • Wagner José Silva Ursi State University of Londrina; Londrina School of Dentistry; Discipline of Restorative Dentistry
  • Tânia Christina Simões Private Practice at Londrina
  • Márcia Furtado Antunes de Freitas University of São Paulo; Bauru School of Dentistry

DOI:

https://doi.org/10.1590/S1678-77572008000100003

Keywords:

Elastomers, Dimensional accuracy, Dental impression materials, Acrylic resins

Abstract

The purpose of this study was to evaluate the accuracy of the respective dies after polyether elastomeric procedure in the presence or absence of cervical contact of the acrylic resin shell with the cervical region, establishing a comparison to dies obtained with stock trays. This study consisted of three groups with 10 specimens each: 1) acrylic copings without cervical contact, (cn); 2) acrylic copings with cervical contact (cc); 3) perforated stock tray, (st). The accuracy of the resulting dies was verified with the aid of a master crown, precisely fit to the master steel die. ANOVA test found statistically significant differences among groups (p<0.001). Tukey's test found that the smallest discrepancy occurred in group cn, followed by cc, while the st group presented the highest difference (cc x cn: p=0.007; st x cn: p<0.001; st x cc: p<0.001).

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Published

2008-02-01

Issue

Section

Original Articles

How to Cite

Sá, A. T. G. de, Freitas, C. A. de, Sá, F. C. de, Ursi, W. J. S., Simões, T. C., & Freitas, M. F. A. de. (2008). Effect of cervical relining of acrylic resin copings on the accuracy of stone dies obtained using a polyether impression material . Journal of Applied Oral Science, 16(1), 7-11. https://doi.org/10.1590/S1678-77572008000100003