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Dimensional changes of endodontic sealers
R B Kazemi1, K E Safavi, L S Spångberg
1Department of Restorative Dentistry and Endodontology, University of Connecticut Health Center, School of Dental Medicine.
Oral Surgery, Oral Medicine, and Oral Pathology
|December 1, 1993
Summary
Long-term studies reveal significant dimensional changes in endodontic sealers. Some materials, like AH26 and Endo-Fill, expand initially then lose volume, impacting dental treatment effectiveness.
Area of Science:
- Dental Materials Science
- Endodontic Research
Background:
- Endodontic sealers are crucial for root canal filling.
- Understanding sealer dimensional stability is vital for long-term treatment success.
Purpose of the Study:
- To conduct a long-term comparison of dimensional changes in various endodontic sealers.
- To evaluate the volumetric stability of different sealer formulations over 180 days.
Main Methods:
- Thin layers of sealers were applied to glass pipettes.
- Dimensional changes were monitored via water meniscus levels for 180 days.
- Sealer mass and volume were measured after drying.
Main Results:
- AH26 and Endo-Fill exhibited initial expansion followed by volumetric loss.
- Zinc oxide eugenol-based sealers showed shrinkage within hours.
- Endo-Fill demonstrated the least dimensional change throughout the study period.
Conclusions:
- Significant dimensional changes and continued volume loss can occur with certain endodontic sealers.
- Material properties greatly influence sealer dimensional stability.
- Clinical implications for long-term root canal treatment outcomes.