DOI: 10.4103/njcp.njcp_551_25 ISSN: 1119-3077

Effect of Ethylenediaminetetraacetic Acid, Sodium Hypochlorite, and Saline Irrigation on Fiber-Post Bond Strength in Endodontically-Treated Teeth: An In vitro Push-Out Study

M Abbas, SBU Rehman, MA Lone, K Aslam, O Khattak, FA Chaudhary
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Background:

Reliable bonding of fiber posts is critical for the long-term success of endodontically-treated teeth. However, the influence of individual irrigants used during post space preparation remains uncertain.

Aims:

To compare the effect of a single one-minute rinse with 17% ethylenediaminetetraacetic acid (EDTA), 5.25% sodium hypochlorite (NaOCl), or saline on the push-out bond strength of fiber posts.

Methods:

This randomized in vitro study used 120 extracted mandibular premolars, which underwent standardized root canal therapy, obturation, and decoronation at the cementoenamel junction. Post spaces were prepared to an 11 mm depth while maintaining a 5 mm apical seal, then irrigated with the assigned solution ( n = 40 per group). Fiber posts were luted with dual-cure resin cement, and push-out bond strength was measured using a universal testing machine. Data were analyzed using one-way analysis of variance (ANOVA) with Tukey post hoc tests.

Results:

ANOVA revealed a significant difference among groups ( F = 51.9, P < 0.001). EDTA resulted in significantly higher mean bond strength (5.22 ± 1.06 MPa) than NaOCl (3.35 ± 0.64 MPa) and saline (2.53 ± 0.56 MPa) ( P < 0.001). NaOCl outperformed saline, but the increase was modest ( P = 0.007).

Conclusion:

A brief one-minute final rinse with 17% EDTA markedly enhances fiber-post retention (5.22 MPa) compared with NaOCl (3.35 MPa) or saline (2.53 MPa).

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