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<p>This study aimed to compare the removability of two bioceramic root canal sealers (Well-Root ST and EndoSeal MTA) with a resin-based sealer (AH Plus) during retreatment in oval-shaped canals. Thirty-six extracted human mandibular premolars with single oval canals were selected. After instrumentation with ProTaper Next, the root canals were obturated using cold lateral condensation with the test sealers and gutta percha cones (<i>n</i> = 12 per group). Retreatment was performed using ProTaper Universal Retreatment files without solvent. The time to reach working length (TWL) and total retreatment time (TRT) were recorded. Residual filling material was evaluated using stereomicroscopy and scanning electron microscopy (SEM). Data were analyzed using One-way ANOVA and Kruskal-Wallis tests, with the significance level set at (<i>p</i> &lt; 0.05). EndoSeal MTA showed the shortest TWL and TRT, similar to AH Plus, but significantly shorter than Well-Root ST (<i>p</i> &lt; 0.05). No significant differences in residual filling material were found among the sealer groups (<i>p</i> &gt; 0.05), although Well-Root ST and AH Plus revealed significantly lower residue levels in the middle third compared to other regions (<i>p</i> &lt; 0.05). SEM analysis revealed significantly more debris and smear layer in the Well-Root ST group, especially in the coronal and middle thirds (<i>p</i> &lt; 0.001). None of the sealers allowed complete removal of filling material. While EndoSeal MTA was removed in a time comparable to AH Plus, Well-Root ST required significantly longer retreatment time and left more debris. No sealer permitted complete removal, highlighting the challenge of retreating oval canals obturated with bioceramic sealers.</p>

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Comparative evaluation of the retreatability of bioceramic-based root canal sealers: an in vitro study

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年6月22日

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  • Sinem Esen Mutlu,
  • Tamer Taşdemir,
  • Tugba Kosar

摘要

This study aimed to compare the removability of two bioceramic root canal sealers (Well-Root ST and EndoSeal MTA) with a resin-based sealer (AH Plus) during retreatment in oval-shaped canals. Thirty-six extracted human mandibular premolars with single oval canals were selected. After instrumentation with ProTaper Next, the root canals were obturated using cold lateral condensation with the test sealers and gutta percha cones (n = 12 per group). Retreatment was performed using ProTaper Universal Retreatment files without solvent. The time to reach working length (TWL) and total retreatment time (TRT) were recorded. Residual filling material was evaluated using stereomicroscopy and scanning electron microscopy (SEM). Data were analyzed using One-way ANOVA and Kruskal-Wallis tests, with the significance level set at (p < 0.05). EndoSeal MTA showed the shortest TWL and TRT, similar to AH Plus, but significantly shorter than Well-Root ST (p < 0.05). No significant differences in residual filling material were found among the sealer groups (p > 0.05), although Well-Root ST and AH Plus revealed significantly lower residue levels in the middle third compared to other regions (p < 0.05). SEM analysis revealed significantly more debris and smear layer in the Well-Root ST group, especially in the coronal and middle thirds (p < 0.001). None of the sealers allowed complete removal of filling material. While EndoSeal MTA was removed in a time comparable to AH Plus, Well-Root ST required significantly longer retreatment time and left more debris. No sealer permitted complete removal, highlighting the challenge of retreating oval canals obturated with bioceramic sealers.