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$Crystallization of Proteins on Chip by Microdialysis for In Situ X-ray Diffraction Studies$

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Published on: April 11, 2021

X-ray diffraction analysis of MTA mixed and placed with various techniques.

F B Basturk^1,2, Mohammad Hossein Nekoofar^3,4, M Gunday¹

¹Department of Endodontics, Faculty of Dentistry, Marmara University, Istanbul, Turkey.

Clinical Oral Investigations

|December 31, 2017

Summary

Mechanical mixing and ultrasonic placement of Mineral Trioxide Aggregate (MTA) did not negatively impact hydration. For MTA Angelus, this combination enhanced calcium hydroxide formation, suggesting improved physical characteristics.

Keywords:

Calcium hydroxide MTA Mechanical mixing Ultrasonic agitation X-ray diffraction analysis XRD

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Area of Science:

Dental Materials Science
Biomaterials Engineering
Crystallography

Background:

Mineral Trioxide Aggregate (MTA) is widely used in endodontics.
Variations in MTA mixing and placement techniques may influence its properties.
Understanding hydration kinetics is crucial for MTA clinical performance.

Purpose of the Study:

To assess the impact of different mixing methods (mechanical vs. manual) and ultrasonic placement on MTA hydration.
To analyze the phase composition of MTA using X-ray diffraction (XRD).

Main Methods:

ProRoot MTA and MTA Angelus were mixed mechanically or manually and subjected to ultrasonic activation.
Specimens were incubated for 4 days at 37°C and 100% humidity.
Phase identification was performed using XRD analysis.

Main Results:

All MTA specimens contained tricalcium silicate, calcium carbonate, and bismuth oxide.
Calcium hydroxide formed in all ProRoot MTA samples.
MTA Angelus showed calcium hydroxide formation only when mechanically mixed and ultrasonically placed.

Conclusions:

Mechanical mixing and ultrasonic placement do not adversely affect MTA hydration.
For MTA Angelus, the combination of mechanical mixing and ultrasonic placement enhances calcium hydroxide formation, potentially improving clinical outcomes.