The Journal of Contemporary Dental Practice

Register      Login



Volume / Issue

Online First

Related articles

VOLUME 18 , ISSUE 11 ( November, 2017 ) > List of Articles


Self-disinfecting Alginate vs Conventional Alginate: Effect on Surface Hardness of Gypsum Cast—An in vitro Study

Ajay Nagpal, Ranjith Madhavan, Navia George, Niharika R Thummala, SV Ravi

Citation Information : Nagpal A, Madhavan R, George N, Thummala NR, Ravi S. Self-disinfecting Alginate vs Conventional Alginate: Effect on Surface Hardness of Gypsum Cast—An in vitro Study. J Contemp Dent Pract 2017; 18 (11):1061-1064.

DOI: 10.5005/jp-journals-10024-2176

Published Online: 01-12-2016

Copyright Statement:  Copyright © 2017; The Author(s).



For the construction of any dental prosthesis, accurate impressions are necessary. Hence, we undertook the present study to evaluate and compare the surface hardness of gypsum casts poured from impressions made using conventional alginate and self-disinfecting alginate.

Materials and methods

A total of 30 impressions of stainless steel die were made, out of which 15 impressions were made with conventional alginate and 15 were made with selfdisinfecting alginate and poured using Type III dental stone. Thirty stone specimens were subjected for hardness testing. Data were analyzed using independent samples t-test to compare the mean surface hardness.


Difference in surface hardness was statistically insignificant (p > 0.05).


Surface hardness of gypsum casts poured using impressions made from self-disinfecting alginate and conventional alginates were comparable.

Clinical significance

Self-disinfecting alginates may be employed in clinical practice as safe and effective materials to overcome the infection control issues without compromising on the properties of the material.

How to cite this article

Madhavan R, George N, Thummala NR, Ravi SV, Nagpal A. Self-disinfecting Alginate vs Conventional Alginate: Effect on Surface Hardness of Gypsum Cast—An in vitro Study. J Contemp Dent Pract 2017;18(11):1061-1064.

PDF Share
  1. Sodium hypochlorite disinfection of irreversible hydrocolloid impression material. J Prosthet Dent 1992 May;67(5):628-631.
  2. The effect of 0.5% sodium hypochlorite and 2% glutaraldehyde spray disenfectants on irreversible hydrocolloid impression material. Indian J Dent Res 2003 Oct-Dec;14(4):187-193.
  3. Antimicrobial activities of dental impression materials. Dent Mater 1998 Nov;14(6):399-404.
  4. The effect of disinfectants on the properties of dental gypsum, Part 2: surface properties. J Prosthodont 2002 Dec;11(4):234-240.
  5. Three-dimensional investigation of the accuracy of impression materials after disinfection. J Prosthet Dent 1993 Nov;70(5):449-456.
  6. Some effects of disinfecting solutions on the properties of alginate impression material and dental stone. Eur J Prosthodont Restor Dent 2001 Sep-Dec;9:131-135.
  7. A self-disinfecting irreversible hydrocolloid impression material mixed with chlorhexidine solution. Angle Orthod 2007 Sep;77(5):894-900.
  8. Immersion disinfection of irreversible hydrocolloid impressions with sodium hypochlorite. Part II: effect on gypsum. Int J Prosthodont 1994 Jul-Aug;7(4):315-322.
  9. Preliminary results from disinfection of irreversible hydrocolloid impressions. J Prosthet Dent 1990 Jun;63(6):701-707.
  10. Effects of a chemical disinfectant on the physical properties of dental stones. Int J Prosthodont 2004 Jan;17(1):65-71.
  11. Impression materials: a comparative review of impression materials most commonly used in restorative dentistry. Dent Clin North Am 2007 Jul;51(3):629-642, vi.
  12. Effects of disinfecting irreversible hydrocolloid impressions on the resultant gypsum casts. J Prosthet Dent 1993 Dec;7:532-537.
  13. Evaluation of a new antiseptic-containing alginate impression material. Br Dent J 1990 Aug;169(3-4):83-86.
  14. Phillips' science of dental materials. 11th ed. Philadelphia: W B Saunders; 2003. p. 239-248.
  15. In vitro evaluation of dimensional stability of alginate impressions after disinfection by spray and immersion methods. J Dent Res Dent Clin Dent Prospects 2010 Autumn;4(4):130-135.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.