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Research Article
- Impact of different agitation methods on smear layer cleaning of mesial canals with accentuated curvature
- Abel Teves Cordova, Murilo Priori Alcalde, Michel Espinosa Klymus, Leonardo Rigoldi Bonjardim, Rodrigo Ricci Vivan, Marco Antonio Hungaro Duarte
- Restor Dent Endod 2024;49(2):e12. Published online March 4, 2024
- DOI: https://doi.org/10.5395/rde.2024.49.e12
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Abstract
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ePub Objectives This study evaluated the impact of different methods of irrigant agitation on smear layer removal in the apical third of curved mesial canals of 3 dimensionally (D) printed mandibular molars.
Materials and Methods Sixty 3D-printed mandibular second molars were used, presenting a 70° curvature and a Vertucci type II configuration in the mesial root. A round cavity was cut 2 mm from the apex using a trephine of 2 mm in diameter, 60 bovine dentin disks were made, and a smear layer was formed. The dentin disks had the adaptation checked in the apical third of the teeth with wax. The dentin disks were evaluated in environmental scanning electron microscope before and after the following irrigant agitation methods: G1(PIK Ultrasonic Tip), G2 (Passive Ultrasonic Irrigation with Irrisonic– PUI), G3 (Easy Clean), G4 (HBW Ultrasonic Tip), G5 (Ultramint X Ultrasonic tip), and G6 (conventional irrigation-CI) (
n = 10). All groups were irrigated with 2.5% sodium hypochlorite and 17% ethylenediaminetetraacetic acid.Results All dentin disks were 100% covered by the smear layer before treatment, and all groups significantly reduced the percentage of the smear layer after treatment. After the irrigation protocols, the Ultra-X group showed the lowest coverage percentage, statistically differing from the conventional, PIK, and HBW groups (
p < 0.05). There was no significant difference among Ultramint X, PUI-Irrisonic, and Easy Clean (p > 0.05). None of the agitation methods could remove the smear layer altogether.Conclusions Ultramint X resulted in the most significant number of completely clean specimens.
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Original Article
- Effect of irrigation methods on the adhesion of Resilon/Epiphany sealer and gutta-percha/AH 26 sealer to intracanal dentin
- Seo-Kyong Kim, Yun-Chan Hwang, In-Nam Hwang, Won-Mann Oh
- J Korean Acad Conserv Dent 2008;33(2):98-106. Published online March 31, 2008
- DOI: https://doi.org/10.5395/JKACD.2008.33.2.098
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Abstract
PDFPubReaderePub
The purpose of this study was to evaluate whether intracanal irrigation method could affect the adhesion between intracanal dentin and root canal filling materials (Gutta-percha/AH 26 sealer and Resilon/Epiphany sealer).
Thirty extracted human incisor teeth were prepared. Canals were irrigated with three different irrigation methods as a final rinse and obturated with two different canal filling materials (G groups : Gutta-percha/AH 26 sealer, R groups : Resilon/Epiphany sealer) respectively.
Group G1, R1 - irrigated with 5.25% NaOCl
Group G2, R2 - irrigated with 5.25% NaOCl, sterile saline
Group G3, R3 - irrigated with 5.25% NaOCl, 17% EDTA, sterile saline
Thirty obturated roots were horizontally sliced and push-out bond strength test was performed in the universal testing machine. After test, the failure patterns of the specimens were observed using Image-analyzing microscope.
The results were as follows.
Gutta-percha/AH 26 sealer groups had significantly higher push-out bond strength compared with the Resilon/Epiphany sealer groups (p < 0.05).
Push-out bond strength was higher when using 17% EDTA followed by sterile saline than using NaOCl as a final irrigation solution in the Resilon/Epiphany sealer groups (p < 0.05).
In the failure pattern analysis, there was no cohesive failure in Group G1, G2, and R1. Gutta-percha/AH 26 sealer groups appeared to exhibit predominantly adhesive and mixed failure patterns, whereas Resilon/Epiphany sealer groups exhibited mixed failures with the cohesive failure occurred within the Resilon substrate.
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