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VOLUME 14 , ISSUE 2 ( March-April, 2013 ) > List of Articles

RESEARCH ARTICLE

Evaluation and Comparison of Dimensional Accuracy of Newly Introduced Elastomeric Impression Material using 3D Laser Scanners: An in vitro Study

Naveen S Yadav, Teerthesh Jain, Amrita Pandita, SMA Feroz, Pradeep, Akankasha Diwedi

Citation Information : Yadav NS, Jain T, Pandita A, Feroz S, P, Diwedi A. Evaluation and Comparison of Dimensional Accuracy of Newly Introduced Elastomeric Impression Material using 3D Laser Scanners: An in vitro Study. J Contemp Dent Pract 2013; 14 (2):265-268.

DOI: 10.5005/jp-journals-10024-1311

Published Online: 01-08-2013

Copyright Statement:  Copyright © 2013; The Author(s).


Abstract

Aim

Aim of the present study was to comparatively evaluate dimensional accuracy of newely introduced elastomeric impression material after repeated pours at different time intervals.

Materials and methods

In the present study a total of 20 (10 + 10) impressions of master model were made from vinyl polyether silicone and vinyl polysiloxane impression material. Each impression was repeatedly poured at 1, 24 hours and 14 days. Therefore, a total of 60 casts were obtained. Casts obtained were scanned with three-dimensional (3D) laser scanner and measurements were done.

Results

Vinyl polyether silicone produced overall undersized dies, with greatest change being 0.14% only after 14 days. Vinyl polysiloxane produced smaller dies after 1 and 24 hours and larger dies after 14 days, differing from master model by only 0.07% for the smallest die and to 0.02% for the largest die.

Conclusion

All the deviations measured from the master model with both the impression materials were within a clinically acceptable range.

Clinical significance

In a typical fixed prosthodontic treatment accuracy of prosthesis is critical as it determines the success, failure and the prognosis of treatment including abutments. This is mainly dependent upon fit of prosthesis which in turn is dependent on dimensional accuracy of dies, poured from elastomeric impressions.

How to cite this article

Pandita A, Jain T, Yadav NS, Feroz SMA, Pradeep, Diwedi A. Evaluation and Comparison of Dimensional Accuracy of Newly Introduced Elastomeric Impression Material using 3D Laser Scanners: An in vitro Study. J Contemp Dent Pract 2013;14(2):265-268.


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  1. The effect of delayed and second pours on elastomeric impression material accuracy. J Prosthet Dent 1979;41:517-20.
  2. In vitro study on the dimensional accuracy of selected materials for monophase elastic impression making. Int J Prosthodont 2002;15:168-74.
  3. The use of a 3D laser scanner using superimpositional software to assess the accuracy of impression techniques. J Dent 2004; 32: 653-58.
  4. Stress relaxation properties of elastomers. Dent Mater 1987;3:37-39.
  5. The time dependent accuracy of elastomeric impression material part II (condensation silicone). J Prosthet Dent 1981;45:329-33.
  6. A laboratory study of dimensional changes for elastomeric impression materials for using in custom and stock trays. Aust Dent J 1996;41(6):398-404.
  7. Comparison of the dimensional accuracy of one-and two-step techniques with the use of putty/wash addition silicone impression materials. J Prosthet Dent 1995;74:535-41.
  8. Accuracy of impression materials in a semiclinical model. Dent Mater 1988;4:64-67.
  9. Linear dimensional change in addition silicone impression material. J Prosthet Dent 1982;47:411-13.
  10. The dimensional stability of impression materials and its effect on in vitro tooth wear studies. Dent Mater 2011;27:253-58.
  11. Clinically oriented evaluation of accuracy of commonly used impression material. J Prosthet Dent 1986;53:784-90.
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