Journal of Operative Dentistry & Endodontics

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VOLUME 1 , ISSUE 2 ( July-December, 2016 ) > List of Articles


Effect of 5% Calcium Hypochlorite on Mechanical Properties of Root Dentin: An in vitro Study

Natanasabapathy Velmurugan, Poornima Reddy, Suma Balla, Sandhya S Raghu, Garlapati T Gupta, Hrudi S Sahoo

Citation Information : Velmurugan N, Reddy P, Balla S, Raghu SS, Gupta GT, Sahoo HS. Effect of 5% Calcium Hypochlorite on Mechanical Properties of Root Dentin: An in vitro Study. J Oper Dent Endod 2016; 1 (2):56-59.

DOI: 10.5005/jp-journals-10047-0012

Published Online: 01-12-2016

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



The aim of this study was to compare in vitro the effect of 5% calcium hypochlorite [Ca(OCl)2] and 5% sodium hypochlorite (NaOCl) on flexural strength and modulus of elasticity of root dentin.

Materials and methods

The available chlorine concentration of each solution was determined using iodometric titration. Standardized planoparallel dentin bars (n= 20) were divided into two test groups and one control group. The control, group 1, consisted of dentin bars stored in normal saline. The dentin bars in the two test groups were treated by exposure to following solutions: Group 2 to 5% Ca(OCl)2; and group 3 to 5% NaOCl. All the three test solutions were changed once in 15 minutes for 30 minutes. The dentin bars were then loaded to failure using three-point bend test.


Available chlorine concentration was 64% in both the test solutions. There was a significant reduction in the flexural strength of 5% NaOCl group compared to 5% Ca(OCl)2-treated ones. A significant difference in modulus of elasticity was observed between the test groups and the control groups and also between the 5% Ca(OCl)2 and 5% NaOCl groups.


Within the limitations of this study, 5% NaOCl reduced the flexural strength and modulus of elasticity of root dentin bars more when compared to 5% Ca(OCl)2.

How to cite this article

Reddy P, Balla S, Raghu SS, Velmurugan N, Gupta GT, Sahoo HS. Effect of 5% Calcium Hypochlorite on Mechanical Properties of Root Dentin: An in vitro Study. J Oper Dent Endod 2016;1(2):56-59.

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