Abstract
Objective The current study was designed to assess the bonding strength of EndoSeal MTA and
AH Plus sealers after using three irrigation protocols as follows: (1) 17% Ethylenediamine
tetraacetic acid, (2) 7% maleic acid, and (3) 37% phosphoric acid.
Materials and Methods Push-out bond strength was evaluated for 60 middle root slices of 1-mm thickness
each. They were horizontally cut from freshly extracted single-rooted human teeth.
A hole in the root canal was made using a carbide round bur of 1.1 mm in diameter
in a middle third root slice. Specimens were dipped in 2.5% NaOCl, and then they were
grouped into three groups; G1: 17% EDTA, G2: 7% maleic acid, and G3: 37% phosphoric
acid as a final irrigant for 3 minutes. Each group was subdivided into two subgroups,
according to the type of sealer, either EndoSeal MTA or AH Plus.
Statistical Analysis After the full set of the sealer, the bond strength was evaluated with the push-out
test by applying a force to each slice using a plunger with a 1-mm diameter. The one-way
Tukey's post hoc test, analysis of variance (ANOVA) test, and Student's t-test were utilized to gather data and statistically evaluate it.
Results The irrigation protocol used exhibited significant influence on the bond strength
of EndoSeal MTA and AH Plus sealers. AH Plus sealer subgroups showed the highest bond
strength with 7% maleic acid, followed by 37% phosphoric acid, and 17% EDTA. While
in the EndoSeal MTA sealer subgroups, the highest bond strength was shown with the
17% EDTA followed by 7% maleic acid and 37% phosphoric acid, respectively.
Conclusion The present study revealed that the type of the final irrigant significantly impacts
the bond strength of the sealer used. The AH Plus sealer bond strength was improved
by using the 7% maleic acid as a final irrigant. In contrast, the EndoSeal MTA sealer
showed the best results with the 17% EDTA as a final irrigant.
Keywords
EDTA - push-out - irrigating solution - bond strength - AH plus - maleic acid - EndoSeal
MTA
