|Baltic Dental and Maxillofacial Journal|
March, 2011, Vol. 13, No. 1
© 2011 Stomatologija
Stomatologija 2011; 13 (1): 15-8 173 KB
Accuracy of the second pour casts using dual-arch trays
Josué Ricardo Broilo, Paula Cristine Ghiggi, Gilberto Antonio Borges, Luiz Henrique Burnett Jr, Ana Maria Spohr
Objective. To compare, in vitro, the accuracy between dental stone casts obtained from the first and the second pour using metallic (Smart) and plastic (Triple Tray) dual-arch trays.
Material and Methods. The impressions were taken using Flexitime® vinyl polysiloxane from a typodont model with a mandibular right first molar prepared for a full crown. Ten impressions were made with each tray and poured using type IV die stone. After 1 hour, the casts were removed from the impressions and, 1-hour later, second pours were completed. The mesio-distal and the buccal-lingual widths at the gingival margin of the prepared tooth on the cast were measured in a perfil projector. The results were submitted to Student’s t-test (α=0.05) using SPSS version 10.0.
Results. There was a statistically significant difference between the first and second pours using the plastic tray in the mesio-distal width.
Conclusion. It could be suggested that a repeated pour is more accurate using a metallic tray.
Key words: impressions, elastomers, silicone, dual-arch tray.
Received: 00 00 2010
Accepted for publishing: 30 03 2011
1Pontifical Catholic University of Rio Grande do Sul, Brazil.
2Department of Dental Materials, University of Uberaba, Brazil
3Department of Restorative Dentistry, Pontifical Catholic University of Rio Grande do Sul, Brazil
4Department of Dental Materials, Pontifical Catholic University of Rio Grande do Sul, Brazil
Josué Ricardo Broilo1 Master degree student
Paula Cristine Ghiggi1 PhD student
Gilberto Antonio Borges2 Assoc. prof.
Luiz Henrique Burnett Jr3 Adjunct prof.
Ana Maria Spohr4 Adjunct prof.
Address correspondence to Dr. Ana Maria Spohr, Pontificial Catholic University of Rio Grande do Sul (PUCRS), Av. Ipiranga 6681, Porto Alegre, Rio Grande do Sul, Brazil.
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