Effect of Chelating Agents on Push-Out Bond Strength of NeoMTA Plus to Root Canal Dentin

Abstract

Objective: To evaluate and compare the effect of 17% Ethylenediaminetetraacetic Acid (EDTA), 9% Etidronic acid (HEDP), and 7% Maleic acid (MA) on the push-out bond strength of NeoMTA Plus sealer to the coronal, middle, and apical thirds of root canal dentin. Material and Methods: Forty single-rooted human maxillary central incisors were selected and decoronated to 12 mm long root fragments. Working length was established and root canals were then enlarged up to rotary Protaper F3. After each instrumentation, the root canal was irrigated with 2.5% NaOCl. For the final irrigation regimen, the specimens were divided into 4 groups (n=10) and treated with EDTA, HEDP, MA or Saline. Root canals were coated with NeoMTA Plus sealer, and obturation was done with single cone obturation technique. Subsequently, three horizontal sections were taken from the coronal, middle and apical thirds of each specimen, and POBS was measured using a universal testing machine. The type of bond failures was assessed under a stereomicroscope. Statistical analysis was done with One-way ANOVA with Tukey's Post hoc analysis. Results: MA and EDTA showed the highest POBS. There was no significant difference in bond strength between MA and EDTA (p>0.05). HEDP and Saline showed lower POBS. Among all the four groups, the coronal third showed the highest values, followed by middle and apical thirds. Conclusion:The type of chelating agent used during the root canal treatment significantly affects the bond strength of NeoMTA Plus to the root canal dentin.

The effectiveness of continuous versus sequential chelation in the removal of smear layer and their influence on push-out bond strength of Bio-C sealer (An in vitro study)

“…Another finding is that POBS decreases in a coronoapical direction, which agrees with Anju et al 34 This is because apical dentin has fewer patent tubules than coronal dentin 7 and more sclerotic dentin, which is not favorable to sealer infiltration.…”

Evaluation of the effects of retro-cavity preconditioning with or without ethylenediaminetetraacetic acid on root surface pH and dislodgement resistance of NeoMTA2 and MTA Flow retro-fills; an ex vivo investigation

“…This was also supported by Ballal et al who reported that use of 17% EDTA as an irrigation solution could increase PBS of Biodentine (20). Likewise, Anju et al also showed that, maximal increase in PBS of NeoMTA Plus was achieved, when 17% EDTA was used as the pre-conditioner (43). This can be due to the capability of EDTA application following NaOCl irrigation in removing the smear layer that could aid in forming retro-ll material tags into conditioned dentin, increasing the micromechanical surface area at the bond interface (44,45).…”

Dentin Bond Strength of Calcium Silicate-Based Materials: A Systematic Review of In Vitro Studies

“…The composition and structure of root dentin, along with its permeability and solubility characteristics, can undergo changes when irrigated with various chelating agents [16]. These alterations impact the bond strength of root canal filling materials to dentin, influencing the sealants' interaction with dentin [16].…”

“…The composition and structure of root dentin, along with its permeability and solubility characteristics, can undergo changes when irrigated with various chelating agents [16]. These alterations impact the bond strength of root canal filling materials to dentin, influencing the sealants' interaction with dentin [16]. Enhancing the surface roughness of root dentin contributes to increased adhesion, which can be attributed to a higher surface energy and bonding area [16].…”