Quantitative analysis of lead in polysulfide-based impression material

AUTOR(ES)

Braga, Aparecida Silva, Braga, Sebastião Roberto Silva, Catirse, Alma Blásida Concepción Elizaur Benitez, Vaz, Luis Geraldo, Mollo Junior, Francisco de Assis

FONTE

Materials Research

DATA DE PUBLICAÇÃO

2007-06

RESUMO

Permlastic® is a polysulfide-based impression material widely used by dentists in Brazil. It is composed of a base paste and a catalyzer containing lead dioxide. The high toxicity of lead to humans is ground for much concern, since it can attack various systems and organs. The present study involved a quantitative analysis of the concentration of lead in the material Permlastic®. The lead was determined by plasma-induced optical emission spectrometry (Varian model Vista). The percentages of lead found in the two analyzed lots were 38.1 and 40.8%. The lead concentrations in the material under study were high, but the product’s packaging contained no information about these concentrations.

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