DOI: 10.36347/sjds.2023.v10i10.001

Pages: 240-253

Objective: The aim of the present study is to compare the in vitro changes in the fracture resistance of human root dentin when exposed to calcium hydroxide+2 % chlorhexidine solution, ledermix, bioactive glass and MTA. Materials & Methods: 70 freshly extracted single rooted teeth were selected and were divided into five groups of 14 teeth each. Group 1-Saline group (control group), Group 2-Calcium Hydroxide and 2 % chlorhexidine solution combination, Group 3-Ledermix, Group 4-Bioactive Glass, Group 5-MTA. Coronal access and endodontic instrumentation was done using specified instruments and techniques. The prepared canal was then filled with saline solution, calcium hydroxide+2 % chlorhexidine solution, ledermix, bioactive glass and MTA and then teeth were sealed with bonded composite resin and teeth kept immersed in saline. After 30 days and 180 days the roots of 7 teeth from each group was sectioned horizontally into 1 mm thick disks depending upon length of root into 4-5 sections and each disk was placed under a universal testing machine and the peak load fracture was recorded and data were analysed accordingly. Results: 1) Results showed that the mean peak load at fracture of Group I (saline group) was higher in both 30 days and 180 days specimen. 2) Group 2 (Calcium Hydroxide and 2 % chlorhexidine solution) showed a decrease in the fracture resistance as compared to all other groups in 30 and 180 days. 3) Mean strength after 30 days for group 1 was 20.50, group 2 was 12.40, Group 3 was 17.20, Group 4 was 13.00, Group 5 was 14.80. 4) Mean strength after 180 days for group 1 was 19.10, group 2 was 11.30, Group 3 was 14.50, Group 4 was 13.40, Group 5 was 15.60. 5) ANOVA tests shows that there is significant difference as p=0.000<0.01. Interpretation and Conclusion: Based on the results of this study it can be concluded that both MTA and BAG can be efficiently used as an alternative to Calcium Hydroxide and 2 % chlorhexidine solution combination.