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The possible role of pH changes during EDTA demineralization of teeth
V Calvo Pérez1, M E Medina Cárdenas, U Sánchez Planells
1Faculty of Dentistry, University of Chile, Santiago.
Oral Surgery, Oral Medicine, and Oral Pathology
|August 1, 1989
Abstract:
Demineralization of dentin is a dynamic process. The pH of EDTA solutions inside pulp cavities decreases as demineralization occurs. Increasing EDTA concentration from 0.1 mol/L to 0.5 mol/L causes a faster acid accumulation and a higher demineralization rate. The efficiency of EDTA solutions decreases as time goes on, probably because of the acid released from EDTAHNa3 (the predominating species under the neutral conditions). Not all the available EDTA reacts after a few hours. The so-called autolimitation might be due to this acidification of the EDTA solution.