The Influence of Residual Calcium Hydroxide Intracanal Medicaments On The Bond Strength Of A Bioceramic Sealer: In Vitro.
Journal Title: International Journal of Dental Science and Innovative Research (IJDSIR) - Year 2019, Vol 2, Issue 3
Abstract
The aim of the study was to compare and evaluate the influence of residual calcium hydroxide intracanal medicaments on the bond strength of an epoxy resin based sealer, AH Plus® (Dentsply Maillefer, Ballaigues) and a bioceramic sealer, SmartPasteBio (Smart-seal, DRFP Ltd., Stamford, UK). Methodology: The root canals of 60 freshly extracted human single rooted mandibular premolars were prepared with the ProTaper System (Dentsply Maillefer, Ballaigues, Switzerland) up to a master apical file size of F3. Canals were obturated with AH Plus or SmartPaste Bio sealer using the single-cone technique either immediately (control group, n = 20) or after a 7-day intracanal calcium hydroxide [Ca(OH)2] medicaments placement (Group 2 [Ca(OH)2+distilled water]; group 3 [Ca(OH)2+2%CHX]). In both groups, Ca(OH)2 medicament removal was performed manually using Protaper F3 followed by passive ultrasonic irrigation with 2.5% NaOCl. A final flush of 17% EDTA was done followed by distilled water rinse. Post obturation specimens were stored for 30 days period before subjecting to push out bond strength testing. A 2-mm-thick middle section of each root was subjected to push-out testing and the maximum loads at failure were recorded in MPa. Results: SmartPaste Bio showed similar bond strength to AH Plus in the control group (P >.05). In group 2, SmartPaste Bio showed higher bond strength values. While in Group 3, both the sealers showed similar bond strengths (P>.05). Conclusion: When calcium hydroxide is used as a medicament, bioceramic sealer may be preferred over epoxy resin based sealer in terms of bond strength. However, with prior placement of combination of calcium hydroxide and 2% chlorhexidine, both sealers performed similarly with respect to dislodgement resistance.
Authors and Affiliations
Dr. Prabala K. V.
Keywords
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