Shear bond strength of three resin based sealers to dentin with and without the smear layer.
Bond strength of root canal sealers to dentin is an important property for the integrity of the sealings of root-canals. The purpose of this study was to test shear bond strength of three endodontic sealers (Diaket, AH Plus and Endo-REZ). The coronal two thirds of ninety extracted human third molars were removed. The smear layer of the exposed dentin surfaces were removed using 17% EDTA followed by 5.25% NaOCl and the teeth were randomly divided into two groups (n = 45). Group 1 was kept as control and in group 2, uniform smear layer was created using waterproof polishing papers. Three-mm long sections of polyethylene tubing were filled with freshly mixed sealer and placed on the dentin surfaces for conducting a shear bond strength test. The data was calculated as MPa and was statistically analyzed using a two way ANOVA, Kruskal-Wallis and Mann-Whitney U tests. A significant difference was found among the bond strength of the sealers, smear layer, and control groups. AH Plus sealer showed the highest bond strength in smear layer removed surfaces (p < 0.05). Pretreatment with EDTA/NaOCl affected bond strength of AH Plus. AH Plus had the highest bond to dentin with or without smear layer.
Eldeniz
Ayce Unverdi
AU
Department of Endodontics, Faculty of Dentistry, University of Selcuk, Konya, Turkey. ayce71@hotmail.com
Erdemir
Ali
A
Belli
Sema
S
D000704:Analysis of Variance; D001729:Bismuth; D003188:Composite Resins; D001840:Dental Bonding; D003786:Dental Pulp Cavity; D003799:Dental Stress Analysis; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; D004853:Epoxy Resins; D006801:Humans; D008422:Materials Testing; D008963:Molar; D011145:Polyvinyls; D011897:Random Allocation; D019279:Resin Cements; D012387:Root Canal Filling Materials; D033081:Shear Strength; D016369:Smear Layer; D018709:Statistics, Nonparametric; D015034:Zinc Oxide
D003188:Composite Resins; D017220:Dentin-Bonding Agents; D004338:Drug Combinations; C481259:EndoRez; D004853:Epoxy Resins; D011145:Polyvinyls; D019279:Resin Cements; D012387:Root Canal Filling Materials; C534916:epoxy resin-based root canal sealer; C014457:bismuth phosphate, copolymers of vinyl acetate, dichlorophen, propionyl-acetophenone, triethanolamine, vinyl chloride, vinylisobutyl ether, zinc oxide drug combination; D015034:Zinc Oxide; D001729:Bismuth