International Journal of Prosthodontics and Restorative Dentistry

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VOLUME 6 , ISSUE 3 ( July-September, 2016 ) > List of Articles

RESEARCH ARTICLE

Time-dependent Variation in Compressive Strengths of Three Posterior Esthetic Restorative Materials: An in vitro Study

Anjna Sharma

Citation Information : Sharma A. Time-dependent Variation in Compressive Strengths of Three Posterior Esthetic Restorative Materials: An in vitro Study. Int J Prosthodont Restor Dent 2016; 6 (3):63-65.

DOI: 10.5005/jp-journals-10019-1157

Published Online: 01-09-2016

Copyright Statement:  Copyright © 2016; The Author(s).


Abstract

Aim

To compare the compressive strengths of composite resins and resin-modified glass ionomer cements (RMGICs) at different times.

Materials and methods

A total of 36 samples were prepared, 12 samples of each group, composite resins Filtek Z 250, Filtek Z 350, and resin-modified glass ionomer cement. Compressive strengths of specimens were measured after 1, 24 hours, and 7 days. Test was carried out on a “Universal Testing Machine” with cross-head speed of 5 mm/min.

Results

There was a significant difference between all the three restorative materials. Analysis of variance showed that mean compressive strengths of Z 250 after 1, 24 hours were higher than Z 350 and RMGIC (p < 0.05). The mean compressive strengths were reduced after 7 days in all the three groups, but after 7 days, the values of Z 250 when compared with the Z 350 and RMGIC were higher.

Conclusion

The study demonstrated that compressive strengths of hybrid composite resins (Z 250) were significantly higher than that of nanocomposites (Z 350) and RMGIC.

How to cite this article

Sharma A, Mishra P, Mishra SK. Time-dependent Variation in Compressive Strengths of Three Posterior Esthetic Restorative Materials: An in vitro Study. Int J Prosthodont Restor Dent 2016;6(3):63-65.


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  1. How should composite be layered to reduce shrinkage stress: Incremental or bulk filling. Dental Mater 2008 Nov;24(11):1501-1505.
  2. Review resin composite. State of the art. Dental Mater 2011 Jan;27(1):29-38.
  3. Curing shrinkage and volumetric changes of resin-modified glass ionomer restorative materials. Dent Mater 1995 Nov;11(6):359-362.
  4. Original evaluation of the compressive strength of hybrid and nanocomposites. J Dent School 2012;30(1):24-29.
  5. In vitro comparative study of compressive strength of different types of composite resins in different periods of time. Iranian J Pharm Sci 2008;4(1):69-74.
  6. New inorganic components for dental filling composites. Monatsh Chem 2005;136(1):21-45.
  7. Update on dental nanocomposites. J Dent Res 2010 Jun;89(6):549-560.
  8. Future perspectives of resin-based dental materials. Dent Mater 2009 Aug;25(8):1001-1006.
  9. Comparative study of the physical properties of core materials. Int J Periodont Res Dent 2002;22:355-363.
  10. Fundamentals of operative dentistry. Chicago, IL: Quintessence Publishing; 2006. p. 560-561.
  11. Introduction to dental material. New York: Mosby; 2007. p. 99-126.
  12. Craig's restorative dental materials. St. Louis, MO: Mosby; 2006. p. 64-65.
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