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<p>Mineral Trioxide Aggregate (MTA): Physical Properties and Clinical Uses<br><br>Lieutenant Commander John J. Neal, DC, USN and Captain Carol Diener Weber, DC, USN<br><br>Introduction<br>Post-treatment endodontic disease is mainly due to leakage of irritants into the apical tissues produced from microbes within the root canal system. An endodontic root repair material should prevent leakage by providing an acceptable seal. Mineral trioxide aggregate (MTA) was developed in 1993, approved by the Federal Drug Administration in 1998, and became commercially available as ProRoot® MTA. A gray version (GMTA) was first produced, however was found to produce discoloration in esthetic zones, therefore a white version (WMTA) was introduced in 2002.
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<br>Subjects: endodontics; root canal therapy;  Acrylic Resins ; Aluminum Compounds;  Calcium Compounds;  Dental Pulp Cavity</div>
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U.S. Navy. Naval Postgraduate Dental School</div>
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