Superfast Set, Strong and Less Degradable Mineral Trioxide Aggregate Cement

Area of Science:

• Dental Materials Science
• Biomaterials Engineering

Background:

• Mineral trioxide aggregate (MTA) exhibits excellent sealing and biocompatibility.
• Limitations of MTA include slow setting, high degradation, and low strength, restricting its use in demanding applications.

Purpose of the Study:

• To develop novel liquid additives to overcome MTA's limitations.
• To enhance MTA's properties for improved clinical performance.

Main Methods:

• Two new liquids (H and P) were prepared using calcium chloride, fumed silica, and hydroxyapatite or calcium phosphate.
• Portland cement, Grey ProRoot® MTA, and white ProRoot MTA were mixed with control (distilled water) or liquids H/P.
• Evaluated properties included pH, setting time, degradation rate, leachant/precipitate composition, compressive strength, and morphology.

Main Results:

• Liquids H and P reduced MTA setting time by 1-2 orders of magnitude while maintaining high alkalinity.
• Both liquids, especially H, significantly decreased the degradation rate of Grey and White ProRoot MTA®.
• Compressive strength was significantly increased, with dense structures observed, indicating improved mechanical properties.

Conclusions:

• The modified MTA formulations demonstrate enhanced properties suitable for surgical endodontics.
• These improved MTA materials are viable for use in high stress-bearing areas.