J Appl Oral Sci. 2008;16(1):7-11 www.fob.usp.br/jaos or www.scielo.br/jaos
EFFECT OF CERVICAL RELINING OF ACRYLIC RESIN COPINGS ON THE ACCURACY OF STONE DIES OBTAINED USING A POLYETHER IMPRESSION MATERIAL André Tomazini Gomes de SÁ1, César Antunes de FREITAS2, Fátima Cristina de SÁ3, Wagner José Silva URSI4, Tânia Christina SIMÕES5, Márcia Furtado Antunes de FREITAS6
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DDS, DDS, DDS, DDS, DDS, DDS,
MSc, Professor, Discipline of Restorative Dentistry, Londrina School of Dentistry, State University of Londrina, PR, Brazil. MSc, PhD, Assistant Professor, Discipline of Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil. MSc, PhD, Professor, Discipline of Restorative Dentistry, Londrina School of Dentistry, State University of Londrina, PR, Brazil. MSc, Professor, Discipline of Restorative Dentistry, Londrina School of Dentistry, State University of Londrina, PR, Brazil. Private Practice at Londrina - PR. Graduate Student in Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil.
Corresponding address: César Antunes de Freitas - Disciplina de Materiais Dentários, Faculdade de Odontologia de Bauru -USP. Alameda Dr. Octávio Pinheiro Brisolla, 9-75 - Vila Universitária - 17043-101 - Bauru - SP. e-mail:
[email protected] Received: October 16, 2006 - Modification: May 28, 2007 - Accepted: October 11, 2007
ABSTRACT
T
he 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
