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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN:
Vol. 7, No. 24, 2008, pp. 1493-1496
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Bioline Code: os08005
Full paper language: English
Document type: Research Article
Document available free of charge
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Brazilian Journal of Oral Sciences, Vol. 7, No. 24, 2008, pp. 1493-1496
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Effect of the flask contention method on the displacement of maxillary denture teeth
de Negreiros, Wagner Araújo; Consani, Rafael Leonardo Xediek; Mesquita, Marcelo Ferraz; Consani, Simonides & Valentino, Thiago Assunção
Abstract
Keeping the flask closed may reduce the stress released by the resin
dough after the pressing step, preserving the tooth relationship pattern.
The aim of this study was to analyze the influence of the flask
contention method on tooth displacement in acrylic resin complete
dentures. Twenty identical maxillary complete dentures were made
using the heat-cured acrylic resins Classico and QC-20, polymerized
by long and fast polymerization cycles respectively, and randomly
assigned to 4 test groups according to the conventional packing method
and RS tension system. Transversal and anteroposterior distances
between specific teeth were measured with a linear optical microscope
before and after denture processing. Analysis of variance (ANOVA)
and Tukey test were used to compare the groups (p<.05). Results
showed that tooth movement was significantly greater for the distance
RI-LI in comparison with the others, and the tooth movement was
not significantly influenced by the packing method. Within the
limitations of this study, the RS tension system presented a similar
performance in reducing the tooth movement, when compared with
the conventional packing method. The anterior region of the denture
may present changes in the tooth position after processing, which
need to be clinically adjusted.
Keywords
denture, complete; tooth, artificial; dental occlusion; polymerization; acrylic resin
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