Comparison of impression techniques and double pouring by dental cast’s accuracy

preliminary clinical-lab trial

Keywords: Dental impression materials, Dental impression technique, Photography, dental, Dimensional measurement accuracy.

Abstract

Aim: This study compared impression techniques and double pouring by means of cast’s accuracy. Methods: For each patient (n=10), impressions from right maxillary canine to first molar were made with acrylic resin trays and vinyl-polysiloxane using one single-step, and four two-steps techniques: relief with poly(vinyl chloride) film; tungsten-carbide bur/scalpel blade; small movements of the tray; non-relief. Total visible buccal surface area of crowns was measured three times using photographs from patients (Baseline) and casts. Mean area values (mm2) between Baseline and casts differences were analyzed by two-way repeated-measures ANOVA (α=.05; 1-β=85%). Results: No significant differences were observed for Impression Techniques (P=.525), Double Pouring (P=.281), and their interaction (P=.809). Conclusion: All impression techniques and double pouring produced casts with similar accuracy.

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Author Biographies

Aion Mangino Messias, Sao Paulo State University
Department of Dental Materials and Prosthodontics, Araraquara Dental School, Unesp – Sao Paulo State University, Araraquara, São Paulo, Brazil.
Stephania Caroline Rodolfo Silva, Sao Paulo State University

Department of Dental Materials and Prosthodontics, Araraquara Dental School, Unesp – Sao Paulo State University, Araraquara, São Paulo, Brazil.

Filipe de Oliveira Abi-Rached, Sao Paulo State University

Department of Dental Materials and Prosthodontics, Araraquara Dental School, Unesp – Sao Paulo State University, Araraquara, São Paulo, Brazil.

Raphael Freitas de Souza, McGill University

Division of Oral Health and Society, Faculty of Dentistry - McGill University, Montreal, Quebec, Canada.

José Maurício dos Santos Nunes Reis, Sao Paulo State University

Department of Dental Materials and Prosthodontics, Araraquara Dental School, Unesp – Sao Paulo State University, Araraquara, São Paulo, Brazil.

References

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Published
2019-11-18
How to Cite
Messias, A. M., Silva, S. C. R., Abi-Rached, F. de O., Souza, R. F. de, & Reis, J. M. dos S. N. (2019). Comparison of impression techniques and double pouring by dental cast’s accuracy. Brazilian Journal of Oral Sciences, 18, e191692. https://doi.org/10.20396/bjos.v18i0.8657273
Section
Article