Effect of Irrigating Agitation after Root End Preparation on the Wall Cleaning and Bond Strength of Calcium Silicate Material in Retrograde Obturation

Abstract

Objective The study aimed to evaluate the cleaning efficacy of irrigant activation with a new ultrasonic tip in root-end preparations and to determine its influence on the bond strength of calcium silicate-based material. Materials and Methods Maxillary canines were prepared and filled, and their root ends resected. Root-end cavities were ultrasonically prepared and randomly distributed into four groups according to the final irrigation protocols: G1 (ultrasonic irrigation [UI] + saline solution [SS]), G2 (syringe irrigation [SI] + SS), G3 (UI + ethylenediaminetetraacetic acid [EDTA]), and G4 (SI + EDTA). Cleaning efficacy analysis employed 72 specimens (n = 18) split longitudinally for imaging of the same areas by scanning electron microscopy (SEM). The percentage of dentinal tubules opened before and after irrigation was used as evaluation parameter. Push-out testing employed 40 specimens (n = 10) sectioned apical region perpendicularly, which slice was placed on a testing machine for the bond strength measurement and failure mode was assessed by SEM. The data were statistically analyzed (α ≤ 0.05). Results G3 (UI + EDTA) removed the smear layer more effectively, showed the best tubule opening (p < 0.05), and presented the highest mean bond strength values (p < 0.05). Failure modes were predominantly adhesive, except for the G3 (UI + EDTA) group, in which they were mainly mixed (80%). Conclusion The results of this study suggest that EDTA 17% agitation promoted better cleaning and smear layer removal, improving the push-out bond strength of calcium silicate material in retrograde obturation.

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 nding is in line with those of Gokturk et al who similarly stated that a signi cant increase in dislocation resistance of MTA Flow and MTA Angelus was found following application of 17% EDTA compared to chitosan-based silver nanoparticles (AgNPs-chitosan), and maleic acid (17). Consistently, Valencia et al stated that 17% EDTA was able to improve PBS of calcium silicate cement to dentin when used as a retro-lling material (42). 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).…”

Push-Out Bond Strength of EndoSeal Mineral Trioxide Aggregate and AH Plus Sealers after Using Three Different Irrigation Protocols

“…This may be a possible explanation for the higher bond strength of the tested EndoSeal MTA sealer in the current study. 36 The push-out bond strength of the EndoSeal MTA sealer was significantly less for phosphoric acid than for 17% EDTA and 7% maleic acid, which could be explained by the demineralization ability of the phosphoric acid being time dependent. 37 The results showed greater bond strength for the AH Plus sealer than the EndoSeal MTA sealer when comparing both EndoSeal MTA and AH Plus sealers in terms of the push-out bond strength, as shown in ►Table 2.…”

“…This may be a possible explanation for the higher bond strength of the tested EndoSeal MTA sealer in the current study. 36 …”

Histological Evaluation of Root Canals by Performing a New Cleaning Protocol “RUA” in Endodontic Surgery

“…Then, after performing a standard retro preparation with retro tip and saline solution, a small ultrasonic tip 25.02 activates EDTA and NaOCl gel to ensure deeper cleaning. Another research [ 23 ] evaluated the activation of EDTA alone and showed great results. Instead, in this work, in addition to the use of EDTA, NaOCl gel was also added.…”