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June 5, 2026BMC Oral HealthOpen Access

Evaluation of irrigation activation techniques for root canal filling material removal in retreatment of 3D-printed curved canals

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Authors

SDSalih DüzgünİAİpek Eraslan AkyüzMÇMehmet Çiçek

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Overview

Randomized trial evaluates how canal curvature affects filling material removal in endodontic retreatment, suggesting tailored irrigation strategies.

Key Points

  • The study investigates how different irrigation techniques affect the removal of filling material in curved root canals during endodontic retreatment.
  • 117 maxillary incisor teeth replicas were 3D printed and filled with GuttaFlow.
  • Teeth were sorted into nine groups based on canal curvature (15°, 30°, 45°) and irrigation methods: conventional needle, sonic, and ultrasonic.
  • Residual filling material was measured using cone-beam computed tomography and analyzed with ANOVA and Kruskal-Wallis tests.
  • Higher canal curvature led to increased residual filling volume, with 0.51 mm³ in the 15° group to 1.80 mm³ in the 45° group (p < 0.001).
  • No significant differences in effectiveness among irrigation techniques (p = 0.094).
  • Canal curvature significantly impacts treatment effectiveness, particularly in the apical region.

Cite This Study

Düzgün et al. (2026) studied this question.

synapsesocial.com/papers/6a2268f9763171746d5477d9https://doi.org/10.1186/s12903-026-08605-y
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