Characterization of calcium oxide in root perforation sealer materials
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Data
2012
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Resumo
Root perforation represents an undesirable complication that may lead to an unfavorable prognosis. The aims of this study were to
characterize and to compare the presence of calcium oxide (CaO) on the chemical composition of materials used for root perforation
therapy: gray and white mineral trioxide aggregate (MTA) and Portland cement (PC), gray MTA+5%CaO and gray MTA+10%CaO.
The last two materials were analyzed to evaluate the increase of CaO in the final sample. CaO alone was used as a standard. Eighteen
polyethylene tubes with an internal diameter of 3 mm and 3 mm in length were prepared, filled and then transferred to a chamber
with 95% relative humidity and a temperature of 37 o C. The chemical compounds (particularly CaO) and the main components were
analyzed by energy-dispersive X-ray microanalysis (EDX). EDX revealed the following concentrations of CaO: gray MTA: 59.28%,
white MTA: 63.09%; PC: 72.51%; gray MTA+5%CaO: 63.48% and gray MTA+10%CaO: 67.55%. The tested materials presented
different concentrations of CaO. Even with an increase of 5 and 10% CaO in gray MTA, the CaO levels found in the MTA samples
were lower than those found in PC.
Descrição
Palavras-chave
MTA, Root perforations, Portland cement, Calcium hydroxide, Calcium oxide
Citação
ESTRELA, Carlos et al. Characterization of calcium oxide in root perforation sealer materials. Brazilian Dental Journal, Rbeirão Preto, v. 23, n. 5, p. 539-546, 2012.