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<p>This study evaluates the adhesive performance of a novel hydroxyapatite-coated gutta-percha (HAGP) in combination with various root canal sealers, using push-out bond strength testing and failure mode analysis. Eighty human single-canal teeth were divided into four groups: three test groups obturated with HAGP using AH Plus, iRoot SP, or GuttaFlow Bioseal, and one control group obturated with conventional gutta-percha (GP) with AH Plus sealer. Push-out bond strength was assessed after 30 days with a universal testing machine, and failure modes were analysed under stereomicroscopy. Results revealed a significantly higher bond strength (<i>p</i> &lt; 0.001) for HAGP compared to the control, regardless of the sealer used. Failure analysis indicated 62.5% mixed failures and 37.5% cohesive failures, with no adhesive failure observed. These findings suggest that HAGP significantly improves gutta-percha adhesion, as demonstrated through the higher bond strength compared to conventional gutta-percha.</p>

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Adhesive performance and failure modes of hydroxyapatite coated gutta percha with different root canal sealers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月6日

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  • Noor Hayati Azami,
  • Nora Sakina Mohd Noor,
  • Afaf Al-Haddad,
  • Rana Diab,
  • Fauzi Majid,
  • Zeti Adura Che Ab Aziz

摘要

This study evaluates the adhesive performance of a novel hydroxyapatite-coated gutta-percha (HAGP) in combination with various root canal sealers, using push-out bond strength testing and failure mode analysis. Eighty human single-canal teeth were divided into four groups: three test groups obturated with HAGP using AH Plus, iRoot SP, or GuttaFlow Bioseal, and one control group obturated with conventional gutta-percha (GP) with AH Plus sealer. Push-out bond strength was assessed after 30 days with a universal testing machine, and failure modes were analysed under stereomicroscopy. Results revealed a significantly higher bond strength (p < 0.001) for HAGP compared to the control, regardless of the sealer used. Failure analysis indicated 62.5% mixed failures and 37.5% cohesive failures, with no adhesive failure observed. These findings suggest that HAGP significantly improves gutta-percha adhesion, as demonstrated through the higher bond strength compared to conventional gutta-percha.