Enhanced Adhesive Performance of Hydroxyapatite-Coated Gutta-Percha with Various Root Canal Sealers: A Push-Out Bond Strength and Failure Mode Analysis

  1. Noor Hayati Azami
  2. Nora Sakina Mohd Noor
  3. Afaf Al-Haddad
  4. Rana Diab
  5. Fauzi Majid
  6. Zeti Adura Che Ab Aziz
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Abstract

This study evaluates the the adhesive performance of a novel hydroxyapatite-coated gutta-percha (HAGP) in combination with various root canal sealers, through 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 a control group using conventional gutta-percha with AH Plus sealer. Push-out bond strength was assessed after 30 days using a universal testing machine, and failure modes were analysed via 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 failure and 37.5% cohesive failure, with no adhesive failure observed. These findings suggest that HAGP significantly improves gutta-percha adhesion which was demonstrated through the higher bond strength compared to conventional gutta-percha.

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  1. Version published to 10.21203/rs.3.rs-6684617/v1 on Research Square