Double dye technique and fluid filtration test to evaluate early sealing ability of an endodontic sealer.

Abstract:

OBJECTIVES:The aim of the present study is to evaluate the possible correlation between sealer penetration into dentinal tubules and sealing ability both in presence and absence of smear layer. MATERIALS AND METHODS:Fourteen maxillary central incisors were treated with 5.25 % NaOCl +10 % EDTA to remove the smear layer (SL-free group) or 5.25 % NaOCl without EDTA (SL group). Root canals were filled using #25 Thermafil Obturators with Topseal sealer labelled with 0.1 wt% rhodamine B. Sealing ability was measured as fluid filtration rate with a fluid-flow meter using water supplemented with 0.3 % calcein fluorescent dye. Specimens were sectioned, observed under confocal microscope to co-localize the presence of sealer (rhodamine B labelling) into dentinal tubules and gaps (calcein labelling) into the root canal. The depth of sealer penetration into dentinal tubules and the percentage of sealer penetration around the root canal were measured at 3, 5 and 8 mm from the apex. RESULTS:No significant differences between groups were observed in fluid filtration rate nor in depth of calcein penetration. Sealer penetration depth and percentage into dentinal tubules were not significantly different between groups, except at 8-mm level in absence of smear layer. CONCLUSION:Sealer penetration at 3- and 5-mm levels was not influenced by smear layer while it was significantly reduced at 8-mm level. Fluid filtration rate was not correlated either with depth of calcein penetration nor with sealer penetration into dentinal tubules. CLINICAL RELEVANCE:The sealing ability of Topseal sealer is not affected by presence or absence of smear layer.

journal_name

Clin Oral Investig

authors

Generali L,Prati C,Pirani C,Cavani F,Gatto MR,Gandolfi MG

doi

10.1007/s00784-016-1878-0

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

1267-1276

issue

4

eissn

1432-6981

issn

1436-3771

pii

10.1007/s00784-016-1878-0

journal_volume

21

pub_type

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