Abstract
Objectives:to compare the apical sealing ability of four root canal sealers. Materials and methods: forty extracted human maxillary canines were instrumented 1 mm short of the anatomical apex and randomly assigned to four groups (n=10), according to the root canal sealer used for obturation: Endofill, AH Plus, EndoREZ and Epiphany. Root canals were obturated with guttapercha points, except for the Epiphany group, in which resin points (Resilon) were used. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal.Results:AH Plus (0.02 mm ± 0.07), Epiphany (0.00 mm ± 0.00) and EndoREZ (0.32 mm ± 0.62) did not differ statistically to each other (p>0.01). EndoFill presented the highest dye penetration mean (0.83 mm ± 0.73) and was statistically different from the other sealers (p<0.01).Conclusions:the resin-based root canal sealers presented lesser apical microleakage than the zinc oxide and eugenol based sealer. No statistical differences were observed among resin based sealers.
Highlights
Endodontic therapy consists of cleaning and shaping the root canal system, removing organic debris and sealing the intracanal space with permanent filling materials
Some authors have reported that the smear layer produced after root canal cleaning and shaping prevents the penetration of sealer into the dentinal tubules[9,20]
Studies have shown that smear layer acts as a passageway for microorganisms and as a medium for viable bacteria entrapped into dentinal tubules[11,21]
Summary
Endodontic therapy consists of cleaning and shaping the root canal system, removing organic debris and sealing the intracanal space with permanent filling materials. Some authors have reported that the smear layer produced after root canal cleaning and shaping prevents the penetration of sealer into the dentinal tubules[9,20]. There are several methods for evaluating the apical sealing of root canal sealers, such as bacterial penetration[25], fluid transport[34], clarification[28], penetration of radioisotopes , 4,15 electrochemical methods[6] and gas chromatography[12]. Seem to be the most widely used[27,29,33] The purpose of this in vitro study was to compare, using a dye penetration test, the sealing ability of two commonly used root canal sealers (Grossman’s sealer and AH Plus) and two recently introduced resin-based sealers (EndoREZ and Epiphany)
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