The Journal of Contemporary Dental Practice

Register      Login

SEARCH WITHIN CONTENT

FIND ARTICLE

Volume / Issue

Online First

Archive
Related articles

VOLUME 17 , ISSUE 2 ( February, 2016 ) > List of Articles

RESEARCH ARTICLE

Assessment of a Synthetic Type IV Cast and a Resin Polyol Used in the Fabrication of Dental Models

Rudys Rodolfo de Jesus Tavarez, Stéphanye T Carvalhal, Mário GN Gomes, Adriana S Malheiros, Letícia M Gonçalves, Etevaldo M Filho

Citation Information : de Jesus Tavarez RR, Carvalhal ST, Gomes MG, Malheiros AS, Gonçalves LM, Filho EM. Assessment of a Synthetic Type IV Cast and a Resin Polyol Used in the Fabrication of Dental Models. J Contemp Dent Pract 2016; 17 (2):160-164.

DOI: 10.5005/jp-journals-10024-1820

Published Online: 01-02-2016

Copyright Statement:  Copyright © 2016; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Objective

To evaluate the dimensional changes, reproduction of details, and surface roughness of a type IV cast and a resin used to fabricate dental models.

Materials and methods

Two commercial brands of materials were evaluated: a type IV synthetic cast (Fuji Rock) and a polyol resin (Novox). Twenty samples were obtained from polyvinyl siloxane molds that reproduced the surface of a metal master model standardized according to the American National Standards Institute/American Dental Association specification no. 19. The materials were used according to the manufacturer's instructions and divided into two groups (n = 10). Each mold was photographed immediately after molding and 1 hour after molding. The obtained models were also photographed and measurements were obtained by using Image J software. The paired t-test was used to compare the molding materials and one-way analysis of variance (ANOVA) was used to compare the dimensional changes between the groups at a significance level of 5%.

Results

Statistically significant differences were observed between the models fabricated with the polyol resin and type IV synthetic cast with regard to reproduction of surface details, surface roughness, and dimensional stability (p < 0.05), with the resin providing superior surface detail reproduction and greater dimensional accuracy.

Conclusion

The polyol resin exhibited superior behavior regarding detail reproduction, surface roughness, and dimensional change compared with the type IV synthetic cast.

How to cite this article

Carvalhal ST, Gomes MGN, Malheiros AS, Gonçalves LM, Bandeca MC, Filho EM, De Jesus Tavarez RR. Assessment of a Synthetic Type IV Cast and a Resin Polyol Used in the Fabrication of Dental Models. J Contemp Dent Pract 2016;17(2):160-164.


PDF Share
  1. Phillips’ science of dental materials. 11th ed. St. Louis: Elsevier; 2003.
  2. Comparison of the dimensional accuracy of epoxy resin die system, improved type IV and type V dental stone die system. Indian J Stomatol 2012;3(4):221-225.
  3. Accuracy of three polyvinyl siloxane putty-wash impression techniques. J Prosthet Dent 2000 Feb;83(2):161-165.
  4. Detail reproduction, contract angles, and die hardness of elastomeric impression and gypsum die material combinations. Int J Prosthodont 2000 May-Jun;13(3):214-220.
  5. A micromechanical evaluation of die hardener on die stone. Dent Mater J 2010 Aug;29(4):433-437.
  6. Influence of the casting material on the dimensional accuracy of dental dies. Braz Oral Res 2011;25(4):357-361.
  7. Study of the physical properties of type IV gypsum, resin-containing, and epoxy die materials. J Prosthet Dent 2000 Apr;83(4):466-473.
  8. Use of epoxy resin in restorative materials. J Dent Res 1956 Jun;35(3):360-369.
  9. Dimensional accuracy of an epoxy die material using different polymerization methods. J Prosthodont 2009 Feb;18(2):156-161.
  10. Dimensional accuracy of an epoxy resin die material using two setting methods. J Prosthet Dent 2000 Mar;83(3):301-305.
  11. Comparative evaluation of few physical properties of epoxy resin, resin-modified gypsum and conventional type IV gypsum die materials: an in vitro study. J Contemp Dent Pract 2012 Jan1;13(1):48-54.
  12. Available at: http://www.talladiumes.com/novox/2014
  13. Dimensional accuracy of stone casts made by a monophase impression technique using different elastomeric impression materials. Braz J Oral Sci 2011 Jul;10(3):175-179.
  14. Dental products: standards, technical specifications and technical reports: ANSI/ADA Standard No. 19: dental elastomeric impression materials Available at: http://www.ada.org/en/science-research/dental-standards/dental-products/products-standardstechnical-specifications-and-technical-reports, 2003
  15. Does the contact time of alginate with plaster cast influence its properties? Braz Oral Res 2012 May-Jun;26(3):197-201.
  16. Dimensional accuracy of 7 die materials. J Prosthodont 2005 Mar;14(1):25-31.
  17. The influence of postpouring time on the roughness, compressive strength, and diametric tensile strength of dental stone. J Prosthet Dent 2014 Dec;112(6):1573-1577.
  18. Delayed linear dimensional changes of five high strength gypsum products used for the fabrication of definitive casts. J Prosthet Dent 2012 Sep;108(3):189-195.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.