IADR Abstract Archives
Bioactivity of Calcium Silicate-Based Endodontic Sealers
Objectives: To evaluate the bioactivity of four calcium silicate-based endodontic sealers after 30 d storage in distilled water and simulated body fluid (SBF).
Methods: Four calcium silicate-based sealers (BioRoot RCS/BRT, TotalFill BC Sealer/TFL, AH Bioceramic Sealer/AHB and CeraSeal /CSL) were studied with an epoxy resin-based sealer (AH Plus /AHP), serving as a control. One week set disk-shaped specimens, were randomly divided into two groups (n=5/material, group) and immersed for 30 d in distilled water (G1) or SBF (G2) at 37oC. Then, they were rinsed with water, air dried and examined by micro-ATR FTIR and HV-SEM/EDS.
Results: In G2 characteristic IR peaks of Ca-P (1150-950 cm-1) were found in all sealers, except for the epoxy control. No such peaks were probed in G1. HV-SEM/EDS revealed the presence of crystalline deposits on G2 bioceramic sealer surfaces not traceable in G1. Elemental mapping showed that the crystalline structures mainly consisted of Ca and Ca-P, with a complementary distribution to sealer Si core element.
Conclusions: The calcium silicate-based sealers studied have been found to induce the formation of apatite-like structures on their surface when stored in SBF.
Methods: Four calcium silicate-based sealers (BioRoot RCS/BRT, TotalFill BC Sealer/TFL, AH Bioceramic Sealer/AHB and CeraSeal /CSL) were studied with an epoxy resin-based sealer (AH Plus /AHP), serving as a control. One week set disk-shaped specimens, were randomly divided into two groups (n=5/material, group) and immersed for 30 d in distilled water (G1) or SBF (G2) at 37oC. Then, they were rinsed with water, air dried and examined by micro-ATR FTIR and HV-SEM/EDS.
Results: In G2 characteristic IR peaks of Ca-P (1150-950 cm-1) were found in all sealers, except for the epoxy control. No such peaks were probed in G1. HV-SEM/EDS revealed the presence of crystalline deposits on G2 bioceramic sealer surfaces not traceable in G1. Elemental mapping showed that the crystalline structures mainly consisted of Ca and Ca-P, with a complementary distribution to sealer Si core element.
Conclusions: The calcium silicate-based sealers studied have been found to induce the formation of apatite-like structures on their surface when stored in SBF.