Abstract
The aim of this study was to evaluate physicochemical properties of calcium silicate-based experimental (CS) endodontic sealers, developed using two different vehicles: polyethylene glycol (PG) (CS-PG) or polyethylene glycol associated to chitosan hydrogel (CS-PGCH). TotalFill BC Sealer (TF) and AH Plus (AHP) were evaluated for comparison. Setting time, flow, radiopacity, pH, solubility and volumetric change were analyzed. Data were submitted to ANOVA and Tukey tests with 5% significance level. The CS-PGCH had significantly greater setting time. CS-PG flow was similar to AHP. CS-PG had higher radiopacity than CS-PGCH. Calcium silicate-based sealers presented alkaline pH in all periods. CS-PGCH presented higher solubility in comparison with CS-PG. The volumetric change of CS-PG was similar to TF after 7 days, and to AHP after 30 days. CS-PG presented proper setting time, radiopacity, flow and pH, besides low volumetric change, showing better results than CS-PGCH, and potential for clinical application.
Highlights
Calcium silicate-based materials were developed as repair cements[1]
The setting time (ST) was considered as the period in minutes, between manipulation and the moment at which the needle did not leave indentation on the surface of the sealer, and the materials were stored in the oven throughout this period
Experimental calcium silicate-base sealer manipulated with polyethylene glycol (CS-PG); Experimental calcium silicate-base sealer manipulated with polyethylene glycol and chitosan hydrogel (CS-PGCH); a FOAr-Unesp, Araraquara, SP, Brazil; b Mineral Research Processing, Meyzieu, France; c Synth, Diadema, SP, Brazil; d Merck, Darmstadt, Germany; e Sigma-Aldrich, St
Summary
Calcium silicate-based materials were developed as repair cements[1]. The presence of tricalcium silicate increases mechanical properties and bioactivity of the materials[2]. Bio-C Sealer is a new ready-to-use bioceramic endodontic sealer that contains polyethylene glycol as vehicle and presents biocompatibility, bioactive potential[7] and suitable physicochemical properties for clinical use[8]. EndoSequence BC (Brasseler, Savannah, GA, USA) and TotalFill BC (FKG, La Chaux-de-Fonds, Switzerland) are premixed bioceramic sealers, which have similar composition[3,9] These sealers present suitable properties[8,9], such as cytocompatibility[10], biocompatibility[11], bioactivity[12] and antimicrobial activity[13]. A previous study[13] evaluating an experimental calcium silicate-based endodontic sealer with polyethylene glycol as vehicle showed cytocompatibility, bioactive potential, and antimicrobial activity, with potential for clinical application. The null hypothesis was that would be no difference among the sealers evaluated regarding these properties
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