Endodontic Sealer Selection
Endodontic Sealer Selection
Root canal sealers fill the space between the gutta-percha core and the canal wall. No obturation technique eliminates the need for sealer. Selecting the right sealer requires balancing biocompatibility, working time, dimensional stability, and compatibility with the chosen obturation technique.
The Role of Sealer in Obturation
Sealer is not a secondary material — it is the primary interface between the obturated core and the canal wall. It fills lateral canals, apical ramifications, dentinal tubules, and the inevitable space between gutta-percha and irregularly shaped canal walls.
Bioceramic Sealers
Bioceramic sealers (e.g., EndoSeal MTA, EndoSeal MTA White) are hydrophilic, calcium silicate-based materials that set in the presence of moisture.
- Dimensional stability or slight expansion on setting.
- Biocompatibility and bioactivity — capable of forming hydroxyapatite in the presence of tissue fluid.
- Alkaline pH on setting — may provide an antimicrobial environment during the setting phase.
- Well-suited to single-cone technique when canal taper is consistent.
Resin-Based Sealers
Resin-based sealers (e.g., AH Plus) have a long clinical track record and excellent adhesion to dentin. They are technique-sensitive, require dry canals for optimal bonding, and are not bioactive.
MTA-Based Materials
MTA-based materials (e.g., Endocem Premix MTA) are used in repair-adjacent obturation scenarios, apical barrier procedures, and cases where biologic sealing is the primary objective.
Matching Sealer to Technique
- Single-cone + bioceramic sealer: appropriate when canal taper is consistent.
- Warm vertical compaction + resin or bioceramic sealer: preferred in complex anatomy.
- Carrier-based systems: compatible with bioceramic sealers.
Bioceramic sealers have shifted the single-cone technique from a compromise to a clinically defensible choice in appropriate cases. Technique and sealer must be selected together, not independently.
References
🔍 Search all endodontic sealer selection literature on PubMed:
Search PubMed ↗Citations are provided as PubMed search links for independent verification. Always confirm via the original source.