The Journal of Contemporary Dental Practice

Register      Login

SEARCH WITHIN CONTENT

FIND ARTICLE

Volume / Issue

Online First

Archive
Related articles

VOLUME 14 , ISSUE 1 ( January-February, 2013 ) > List of Articles

RESEARCH ARTICLE

An in vitro Evaluation of Diametral Tensile Strength and Flexural Strength of Nanocomposite vs Hybrid and Minifill Composites cured with Different Light Sources (QTH vs LED)

K Venkata Srikanth, Surendra Nath Garapati, Priyadarshini, Piyush Raturi, Dinesh Shetty

Citation Information : Srikanth KV, Garapati SN, P, Raturi P, Shetty D. An in vitro Evaluation of Diametral Tensile Strength and Flexural Strength of Nanocomposite vs Hybrid and Minifill Composites cured with Different Light Sources (QTH vs LED). J Contemp Dent Pract 2013; 14 (1):84-89.

DOI: 10.5005/jp-journals-10024-1276

Published Online: 01-02-2013

Copyright Statement:  Copyright © 2013; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Background

Composites always remained the target of discussion due to lot of controversies around it. Mechanical properties are one of them. With the introduction of new technology and emergence of various composites which combine superior strength and polish retention, nanocomposites have led to a new spark in the dentistry. A recent curing unit LED with various curing modes claims to produce higher degree of conversion.

The aim of this study was to evaluate the diametral tensile strength and flexural strength of nanocomposite, hybrid and minifill composites cured with different light sources (QTH vs LED).

Materials and methods

Seventy-two samples were prepared using different specially fabricated teflon molds, 24 samples of each composite were prepared for the diametral tensile strength (ADA specification no. 27) and the flexural strength (ISO 4049) of the 12 samples, six were cured with LED (Soft Start curing profile) and other six with QTH curing light and tested on a universal testing machine.

Results

The nanocomposite had highest diametral tensile strength and flexural strength which were equivalent to the hybrid composite and superior than the minifill composite.

Conclusion

With the combination of superior esthetics and other optimized physical properties, this novel nanocomposite system would be useful for all posterior and anterior applications.

How to cite this article

Garapati SN, Priyadarshini, Raturi P, Shetty D, Srikanth KV. An in vitro Evaluation of Diametral Tensile Strength and Flexural Strength of Nanocomposite vs Hybrid and Minifill Composites cured with Different Light Sources (QTH vs LED). J Contemp Dent Pract 2013;14(1):84-89.


PDF Share
  1. An application of nanotechnology in advanced dental materials. J Am Dent Assoc 2003;134:1382-90.
  2. Nanotechnology in dentistry: Reduction to practice. Dent Update 2003;30:10-15.
  3. A nanotechnology composite. Compedium 2003;24:662-70.
  4. Analysis of strength properties of light cured resin composites. Dent Mater 1999;15:174-79.
  5. Composite microfiller content and its effect on fracture toughness and diametral tensile strength. Dent Mater 1999;9:95-98.
  6. Diametral tensile strength and dental composites. Dent Mater 1987;3:46-48.
  7. Changes in flexural properties of composite restoratives after ageing in water. Oper Dent 2002;27:468-74.
  8. Flexural strength and modulus of a novel ceramic restorative cement intended for posterior restorations as determined by a three-point bending. Acta Odontol Scand 2003;61:87-92.
  9. Advances in light curing. Am J Dent 2000;13:77-81.
  10. Effect of a LED versus halogen light cure polymerization on the curing characteristics of three composite resins. Am J Dent 2003; 16:323-28.
PDF Share
PDF Share

© Jaypee Brothers Medical Publishers (P) LTD.