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ISSN 0001-0944 (Print)
Órgano Oficial de la Asociación Dental Mexicana

2000, Number 4

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Rev ADM 2000; 57 (4)

Physical-chemical analysis of mineral trioxide aggregate (MTA) by X-rays diffraction, calorimetry and electronic microscopy

Herzog-Flores DS, Andrade VLM, Méndez GV, Medellín RFJ, Benavidez GMV, González BV

Language: Spanish
References: 12
Page: 125-131
PDF size: 209.51 Kb.


ABSTRACT

The purpose of the study is to know the chemical and physical composition of mineral. Trioxide Aggregate (MTA). This composition is known to be and excellent choice in several treatments of endodontics. The chemical composition through analysis and X-ray difraction reported 18.8% of the material is insoluble in water, (0.36% MgO, and 90% CaO) the cristalinity is close to 80%, the material is a natural complex cristal. The direct heat at 37°C showed that after being exposed for 1.5 Ls it starts to lose cristalinity and with that adherence. The differential scan technique showed a 100°C fusion point with the potenciometer it was verified and Alka Line Ph. The calcium Ions were quantified with the atomic absortion spectrophotometer (Perkin Elmer 5100), it showed 8.8 PPM at 24 hs and 7 days, 10.08 PPM at 15 days and 10.10 ppm at 21 days. The MTA is a complex material with a high Ca content. Chemically attached to MG, Al, Si, O. Its alkaline Ph inhibits bacterial growth and its cristal composition favours great adhesion.


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