Quantitative analysis of lead in polysulfide-based impression material

Materials Research

Aparecida Silva Braga²  Sebastião Roberto Silva Braga¹  Alma Blásida Concepción Elizaur Benitez Catirse²  Luis Geraldo Vaz¹  Francisco De Assis Mollo Junior¹ 

[1] ,University of São Paulo Ribeirão Preto School of Dentistry Department of Dental Materials and ProstheticsRibeirão Preto

关键词: Permlastic®;    impression materials;    polysulfides;    lead;   

DOI  :  10.1590/S1516-14392007000200011

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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