Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
Vol. 8, No. 3, 2009, pp. 128-131
Bioline Code: os09026
Full paper language: English
Document type: Research Article
Document available free of charge
Brazilian Journal of Oral Sciences, Vol. 8, No. 3, 2009, pp. 128-131
© Copyright 2009 - Piracicaba Dental School - UNICAMP São Paulo - Brazil
Cast metal core adaptation using two impression materials and intracanal techniques|
Camarinha, Sônia Maria Lemos Brancato; Pardini, Luiz Carlos; Garcia, Lucas da Fonseca Roberti; Consani, Simonides & Pires-de-Souza, Fernanda de Carvalho Panzeri
This study evaluated the adaptation of cast metal cores (CMCs) using two impression materials and
two intracanal impression techniques.
Ten single-rooted human teeth had their root canals
prepared to receive a CMC. Intracanal impressions were obtained with addition and condensation silicone
materials using two types of intraradicular supports: hypodermic needle or prefabricated polycarbonate
posts. Four impressions were obtained from each tooth totalizing 40 models, on which CMCs were prepared.
CMC adaptation to the canal was analyzed radiographically and microscopically. The teeth were
radiographed with the CMC positioned and the images were analyzed using an image-analysis software
(ImageLab). In the second analysis, the teeth were sectioned longitudinally and the CMC adaptation was
evaluated with a two-coordinate microscope. In both analyses, CMC adaptation to the canal was determined
by calculating the percentage of the prepared canal space that was occupied by the core.
significant difference (2-way ANOVA - Bonferroni; p<0.05) was found between the mean values CMC adaptation
obtained with the two intraradicular supports.
The intracanal impression technique using
hypodermic needle allowed a more accurate reproduction of the prepared canal space and provided
significantly better CMC adaptation when the cores were obtained from addition silicone impressions.
impression technique, cast posts, silicone elastomers, intraradicular support
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