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Magnesium phosphate cements for endodontic applications with improved long-term sealing ability
G Mestres1, F S Aguilera, N Manzanares
1Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgy, Technical University of Catalonia, Barcelona, Spain; Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain.
Three new radiopaque Magnesium Phosphate Cements (MPCs) show excellent handling, mechanical properties, and long-term sealing ability, outperforming Mineral Trioxide Aggregate (MTA) in endodontic applications.
Area of Science:
- Materials Science
- Biomaterials Engineering
- Dental Materials
Background:
- Magnesium Phosphate Cements (MPCs) are being explored for endodontic applications.
- Radiopacity is a critical property for endodontic materials.
- The handling, mechanical properties, and sealing ability of MPCs need thorough characterization.
Purpose of the Study:
- To characterize three novel radiopaque Magnesium Phosphate Cements (MPCs) for endodontic use.
- To evaluate their setting time, injectability, porosity, and compressive strength.
- To assess their long-term sealing ability compared to Mineral Trioxide Aggregate (MTA).
Main Methods:
- Formulated three experimental MPCs with varying phosphate salts and Bi2O3 for radiopacity.
- Characterized physical and mechanical properties: setting time, injectability, porosity, compressive strength.
- Assessed long-term sealing ability in single-rooted teeth using a fluid filtration system and compared with MTA.
Main Results:
- MPCs with 10 wt% Bi2O3 achieved adequate radiopacity per ISO 6876.
- MPCs exhibited short setting times (6-9 min) and high early compressive strength (17-34 MPa).
- All MPCs demonstrated superior sealing ability to MTA at 3 and 6 months.
Conclusions:
- The developed MPCs possess favorable handling and mechanical properties with low degradation.
- These MPCs offer stable and superior sealing ability for endodontic applications.
- MPCs show promise as root canal filling materials or sealers, outperforming MTA.
