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Evaluation of the Effect of Novel Endodontic Irrigant on the Mechanical Properties of Root Dentin - An Evaluative
Kothandaraman Sathyanarayanan1, Tharanikumar Sivakumar2, Angambakkam Rajasekaran Pradeep Kumar3
1Department of Conservative Dentistry and Endodontics, Sathyabama Dental College and Hospital, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Chennai, Tamil Nadu, India.
Context:
Different concentrations of sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), and cetrimide have varied effects on the mechanical properties of endodontically treated teeth.
Aim:
This study aims to evaluate the mechanical properties of root dentin after exposure to different endodontic irrigating solutions.
Methods And Materials:
A novel endodontic irrigant was formulated by mixing freshly prepared 3% NaOCl with 1% hyaluronic acid gel in a 3:1 ratio. Forty-eight root dentin beams (12 × 2 × 1 mm) and 24 mid-root dentin discs were obtained from freshly extracted maxillary canines. The dentin beams and discs were divided into six groups ( n = 8, n = 4, respectively) and exposed to irrigating solutions: Group 1: 5% NaOCl and 17% EDTA, Group 2: 5% NaOCl and 17% EDTA with 0.2% cetrimide, Group 3: 3% NaOCl and17% EDTA, Group 4: 3% NaOCl and 17% EDTA with 0.2% cetrimide, Group 5: 0.9% normal saline and Group 6: 3% NaOCl with 1% hyaluronic acid and 17% EDTA. Next, they were subjected to flexural tests. The Knoop Microhardness test was performed on the dentin discs before and after exposure to the irrigant. One-way ANOVA, paired t -test, and Tukey's Honestly Significant Difference (HSD) post-hoc test were used to analyse the results at P < 0.05.
Results:
All experimental groups exhibited reduced flexural strength compared with normal saline (group 5). Group 2 had a significantly reduced flexural strength, with a mean value of 106.43 MPa, compared with Group 5 ( P = 0.018).
Conclusions:
Root dentin exposed to the novel endodontic irrigant had similar flexural strength and microhardness as root dentin exposed to other irrigants.
