Does Adding Various Accelerators to Mineral Trioxide Aggregate Have a Negatively Effect on Push-Out Bond Strength?

• Published in: Medical principles and practice 2019-04, Vol.28 (1), p.36-40
• Main Authors: İlker, Alper, Sarıyılmaz, Evren, Çakici, Fatih
• Format: Article
• Language: English
• Subjects: Aluminum Compounds - pharmacology; Biocompatibility; Bond strength; Calcium Chloride - pharmacology; Calcium Compounds - pharmacology; Cellulose - analogs & derivatives; Cellulose - pharmacology; Cement hydration; Computer simulation; Dental Bonding - methods; Dental Stress Analysis; Dentin; Drug Combinations; Glycerol - pharmacology; Humans; Original Paper; Oxides - pharmacology; Phosphates - pharmacology; Physical properties; Propylene Glycols - pharmacology; Random Allocation; Silicates - pharmacology; Teeth; Tooth Root
• ISSN: 1011-7571; 1423-0151
• DOI: 10.1159/000494057

Objective: This study compares the effect of the white mineral trioxide aggregate (WMTA) accelerators, including disodium hydrogen orthophosphate (Na 2 HPO 4 ; 2.5 wt%), calcium chloride (CaCl 2 ; 5 and 10 wt%), and KY jelly, on the push-out bond strength of WMTA. The null hypothesis was that the WMTA accelerators would not affect the push-out bond strength of WMTA. Materials and Methods: Slices (2-mm-thick) were obtained from 75 human mandibular molar distal roots. The slices were enlarged up to size 6 Gates-Glidden burs to obtain a 1.5-mm canal diameter. The slices were randomly divided into 4 experimental groups and a control group (n = 15 in each group). Freshly prepared WMTA mixture was placed into the root slices and stored at 37°C in a 100% humidified atmosphere for 60 days. The force required to dislodge the WMTA cement from the root slice was determined using a universal testing machine. The push-out bond strength was calculated. Results: Push- out bond strength of 5- and 10-wt% CaCl 2 , and 2.5-wt% Na 2 HPO 4 WMTA groups was significantly lower than in the KY-jelly and control groups (p < 0.05). The mean push-out bond strength of KY jelly was lower than in the control group but not statistically significant. Conclusion: The addition of KY jelly to WMTA did not have an adverse effect on the push-out bond strength of WMTA, in contrast to the other accelerators, including Na 2 HPO 4 and CaCl 2 , which reduced the push-out bond strength.