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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

Summary

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.

E-mail address: anaspohr@terra.com.br



	Baltic Dental and Maxillofacial Journal

March, 2011, Vol. 13, No. 1 CONTENTS SCIENTIFIC ARTICLES Percutaneous injuries and hepatitis B vaccination among Lithuanian dentists Jurate Rimkuviene, Alina Puriene, Vytaute Peciuliene, Linas Zaleckas 2-7 Assessment of the Posteroanterior Cephalograms of the Parents of Children with Cleft Lip and/or Cleft Palate in Latvia Ieva Maulina, Ilze Akota 8-14 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 15-18 The influence of bone mineral density and body mass index on resorption of edentulous jaws Baiba Ozola, Anda Slaidina, Lija Laurina, Una Soboleva, Aivars Lejnieks 19-24 Transantral distraction devices in correction of severe maxillary deformity in cleft patients Shokhruh Shokirov, Konrad Wangerin 25-30 © 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 Summary 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. E-mail address: anaspohr@terra.com.br