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Tytuł pozycji:

Smear layer removal and sealer penetration with different tapers after using photon-initiated photoacoustic streaming technique.

Tytuł :
Smear layer removal and sealer penetration with different tapers after using photon-initiated photoacoustic streaming technique.
Autorzy :
Eldeeb IM; Department of Endodontics, Ain Shams University, Cairo, Egypt.
Nawar NN; Department of Endodontics, Faculty of Dentistry, The British University, 81-11-11 El-Rehab, Cairo, 11841, Egypt.
Saber SM; Department of Endodontics, Ain Shams University, Cairo, Egypt. .; Department of Endodontics, Faculty of Dentistry, The British University, 81-11-11 El-Rehab, Cairo, 11841, Egypt. .
Hassanein EE; Department of Endodontics, Ain Shams University, Cairo, Egypt.
Schäfer E; Central Interdisciplinary Ambulance in the School of Dentistry, University of Münster, Münster, Germany.
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Źródło :
Clinical oral investigations [Clin Oral Investig] 2021 Feb 04. Date of Electronic Publication: 2021 Feb 04.
Publication Model :
Ahead of Print
Typ publikacji :
Journal Article
Język :
Imprint Name(s) :
Publication: Berlin : Springer-Verlag
Original Publication: Berlin : Springer, c1997-
References :
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Contributed Indexing :
Keywords: Activation; Apical taper; EDTA; PIPS; Sealer penetration; Smear layer; Sodium hypochlorite
Entry Date(s) :
Date Created: 20210204 Latest Revision: 20210204
Update Code :
Czasopismo naukowe
Objective: To evaluate the effect of the photon-initiated photoacoustic streaming (PIPS) technique on irrigation performance with different instrumentation tapers in root canals regarding smear layer removal and subsequent sealer penetration.
Materials and Methods: One hundred twenty human mandibular molars were divided into three equal groups according to the apical preparation taper (25/4%, 25/6%, and 25/8%). Each group was divided into two equal subgroups, one received passive irrigation (PI) while the other received PIPS activation of 2.5% sodium hypochlorite and 17% EDTA. Half the samples were evaluated using electron microscope images to assess smear layer removal. The other half was obturated using gutta-percha and rhodamine B-labeled AH Plus sealer before being sectioned horizontally at different root levels (coronal, middle, and apical) to evaluate the percentage of sealer penetration using CLSM. Mann-Whitney U and Friedman tests were used to analyze smear layer scores, while sealer penetration data were analyzed using the three-way analysis of variance (ANOVA) and Tukey's post hoc test.
Results: Statistical analysis showed significantly better smear layer removal and better sealer penetration after PIPS activation when corresponding root thirds were compared (P<0.001). Only exception was sealer penetration in the apical third with root canal preparation of 25/4% where the difference between the irrigation methods was statistically insignificant (P>0.05).
Conclusions: The use of PIPS activation in the final irrigation protocol enhanced smear layer removal and sealer penetration into dentinal tubules if the taper of the prepared canal was at least 6%.
Clinical Relevance: Increasing apical preparation taper significantly enhances PIPS performance in terms of irrigation activation thus enhancing smear layer removal and subsequent sealer penetration in dentinal tubules.

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