Push-out bond strength and dentinal tubule penetration of different root canal sealers used with coated core materials.
10.5395/rde.2016.41.2.114
- Author:
Derya DENIZ SUNGUR
1
;
Nuhan PURALI
;
Erdal COŞGUN
;
Semra CALT
Author Information
1. Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey. gusefdeniz@yahoo.com
- Publication Type:Original Article
- Keywords:
Adhesion;
Coated core;
Monoblock;
Root canal sealer;
Tubule penetration
- MeSH:
Dental Pulp Cavity*;
Dentin*;
Edetic Acid;
Glass;
Gutta-Percha;
Humans;
Incisor;
Rhodamines;
Smear Layer
- From:Restorative Dentistry & Endodontics
2016;41(2):114-120
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVES: The aim of this study was to compare the push-out bond strength and dentinal tubule penetration of root canal sealers used with coated core materials and conventional gutta-percha. MATERIALS AND METHODS: A total of 72 single-rooted human mandibular incisors were instrumented with NiTi rotary files with irrigation of 2.5% NaOCl. The smear layer was removed with 17% ethylenediaminetetraacetic acid (EDTA). Specimens were assigned into four groups according to the obturation system: Group 1, EndoRez (Ultradent Product Inc.); Group 2, Activ GP (Brasseler); Group 3, SmartSeal (DFRP Ltd. Villa Farm); Group 4, AH 26 (Dentsply de Trey)/gutta-percha (GP). For push-out bond strength measurement, two horizontal slices were obtained from each specimen (n = 20). To compare dentinal tubule penetration, remaining 32 roots assigned to 4 groups as above were obturated with 0.1% Rhodamine B labeled sealers. One horizontal slice was obtained from the middle third of each specimen (n = 8) and scanned under confocal laser scanning electron microscope. Tubule penetration area, depth, and percentage were measured. Kruskall-Wallis test was used for statistical analysis. RESULTS: EndoRez showed significantly lower push-out bond strength than the others (p < 0.05). No significant difference was found amongst the groups in terms of percentage of sealer penetration. SmartSeal showed the least penetration than the others (p < 0.05). CONCLUSIONS: The bond strength and sealer penetration of resin-and glass ionomer-based sealers used with coated core was not superior to resin-based sealer used with conventional GP. Dentinal tubule penetration has limited effect on bond strength. The use of conventional GP with sealer seems to be sufficient in terms of push-out bond strength.
