Comparison of Acidic versus Alkaline Environment for Furcation Perforation Repair among Calcium Silicate Based Materials: An in vitro Comparative Study

Aim: The aim of this study was to compare the effect of acidic and alkaline environment on the dislodgement resistance of White Pro Root Mineral Trioxide Aggregate and Biodentine when used as furcation perforation repair materials. Methodology: Eighty, human, mandibular molars were used. Perforations were made in the furcation of each molar and enlarged to #3 Peeso drills. After perforation repair, according to the two materials respectively, specimens of each material were randomly divided into 4 groups (n = 10) according to storage media and time: group A: phosphate-buffered saline (PBS) (pH = 7.4) for 4 days, group B: acetic acid (pH =5.4) for 4 days, group C: PBS for 34 days, and group D: acetic acid (pH = 5.4) for 4 days followed by exposure to PBS for 30 days. Dislodgment resistance was then measured using a universal testing machine. Results: Biodentine resisted dislodgement more efficiently than Pro Root MTA in PBS (p<0.05). The dislodgement resistance of Biodentine and Pro Root MTA was reduced after exposure to acidic pH, but there was significant reduction of Pro Root MTA in comparison with Biodentine. Conclusion: An acidic environment affects the bond strength of calcium silicate based materials. Biodentine has better dislodgement resistance than White Pro Root Mineral Trioxide Aggregate (MTA).