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VOLUME 13 , ISSUE 3 ( May-June, 2012 ) > List of Articles


A Comparative Study to Determine the Wettability and Castability of Different Elastomeric Impression Materials

N Simhachalam Reddy, G Vivekananda Reddy, Jayaprkash Itttigi

Citation Information : Reddy NS, Reddy GV, Itttigi J. A Comparative Study to Determine the Wettability and Castability of Different Elastomeric Impression Materials. J Contemp Dent Pract 2012; 13 (3):356-363.

DOI: 10.5005/jp-journals-10024-1151

License: CC BY-NC 3.0

Published Online: 01-06-2012

Copyright Statement:  Copyright © 2012; Jaypee Brothers Medical Publishers (P) Ltd.



The aim of this study was to determine the wettability of different hydrophilic and hydrophobic elastomeric impression materials and the gypsum castability.

Materials and methods

The wettability was evaluated by determining the contact angles of different elastomeric impression materials. The contact angle was determined by placing a drop of aqueous solution of calcium sulfate dihydrate on the flat surface of impression material and specimens were measured using a profile projector.

Gypsum castability was determined by counting the number of voids formed in the die stone cast made from the impressions of a aluminum die. The voids were counted using an diopter magnifying lens.


Polyether, different viscosities of polyvinyl siloxane, and condensation silicone impression materials exhibited low contact angle values and least number of voids in the die stone cast when compared with polysulfide impression material.


There was significant correlation between the contact angle and voids formed in the die stone casts when fabricating die stone casts from various elastomeric impression material impressions.

Clinical significance

Accurate reproduction of prepared tooth or edentulous arch is of clinical importance in the fabrication of a fixed or removable prosthesis. Inaccuracies in the replication processes will ultimately have an adverse effect on the fit and adaptation of final restoration. The interaction is determined in part by hydrophilic and hydrophobic nature of the elastomeric impression material. Inadequate wetting of an impression results in voids in the stone casts.

How to cite this article

Reddy GV, Reddy NS, Itttigi J, Jagadeesh KN. A Comparative Study to Determine the Wettability and Castability of Different Elastomeric Impression Materials. J Contemp Dent Pract 2012;13(3):356-363.

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  1. Wettability of elastomeric impression materials and voids in gypsum casts. J Prosthet Dent 1991;66:261-65.
  2. Wettability of a hydrophilic addition silicone impression materials. J Prosthet Dent 1989;61:197-202.
  3. The effect of non-ionic surfactants on bubble entrapment in elastomeric impression materials. The Journal of Prosthetic Dentistry 1979;42:3;342-47.
  4. Accuracy of casts produced from seven rubber impression materials: JADA 1973;87:126-30.
  5. Accuracy of stone casts produced from the three classes of elastomeric impression materials. JADA 1974;1:644-48.
  6. Fine detail reproduction of very high viscosity poly vinyl impression materials. J Prosthodont 1989;2:368-70.
  7. The relationship between critical convergence angle and surface defects. Quintessence Int 1990;21:675-79.
  8. Wettability of nonaqueous elastomeric impression materials. Int J Prosthodont 1991;4:555-60.
  9. Dimensional accuracy and surface details reproduction of two hydrophilic vinyl polysiloxane impression materials tested under dry, moist, and wet conditions. J Prosthet Dent 2003;90:365-72.
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