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Retreatment of Bioceramic Sealers Using a Novel Solvent: Dissolution, Patency, and Dentinal Effects
Jemma Hanson1, Michelle Wu1, Ajay Shakya2
1Department of Endodontics, Texas A&M College of Dentistry, Dallas, Texas.
Journal of Endodontics
|January 27, 2026
Summary
Endo Sealer Solvent (ESS) and ethylenediaminetetraacetic acid (EDTA) effectively dissolved bioceramic sealer, but all tested solvents achieved 100% canal patency. Solvent choice does not impact clinical outcomes for maintaining patency after root canal obturation.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Bioceramic sealers are increasingly used in root canal therapy.
- Effective removal of sealer remnants is crucial for retreatment and maintaining canal patency.
- Solvent efficacy and dentin compatibility vary, necessitating comparative studies.
Purpose of the Study:
- To evaluate the effectiveness of Endo Sealer Solvent (ESS), sodium hypochlorite (NaOCl), ethylenediaminetetraacetic acid (EDTA), and chloroform (CHCl3) in dissolving bioceramic sealer.
- To assess the impact of these solvents on maintaining apical patency in root canals obturated with bioceramic sealer.
- To examine the effects of the solvents on dentin structure.
Main Methods:
- Disk-shaped bioceramic sealer specimens were immersed in solvents to measure weight loss.
- Single-canal teeth were obturated, and the time to regain apical patency using solvents was recorded.
- Scanning electron microscopy evaluated dentinal changes after irrigation.
Main Results:
- ESS and EDTA demonstrated the highest dissolution of bioceramic sealer, significantly outperforming NaOCl and CHCl3.
- All tested irrigants successfully achieved 100% apical patency without significant differences in time.
- Scanning electron microscopy revealed no dentinal erosion; ESS and EDTA effectively removed the smear layer, unlike NaOCl and CHCl3.
Conclusions:
- ESS and EDTA are highly effective in dissolving bioceramic sealer while preserving dentin integrity.
- Despite differences in dissolution efficacy, all evaluated solvents ensure complete canal patency.
- Solvent selection does not appear to influence the clinical achievement of patency in endodontic retreatment.
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