Analysis of inorganic composition and release of formaldehyde after manipulation of endodontic sealers / Analise da composição inorganica e da liberação de formaldeido apos a manipulação de cimentos endonticos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

This study evaluated chemical composition (inorganic) and formaldehyde presence in root-canal sealers. Seven root-canal sealers were chosen: four based-zinc-oxide-eugenol (ZOE) (Targer Canal Sealer, Konne; Endo Fill, Dentsply; Endométhasone N, Septodont and; Pulp Canal Sealer, Kerr); two based-mineral trioxide aggregate (MTA) (Endo CPM Sealer, EGEO Dental and Obtura, Ângelus) and; one based-resin/calcium hydroxide (Sealer 26, Dentsply). All materials were mixed according to the manufacturer´s instructions and inserted in one matrix (5 cm diameter and 0.5 cm thickness. X-Ray Powder Diffraction and Chromatography was performed after freshly mixed, for chemical composition and presence of formaldehyde, respectively. The results showed that: all ZOE materials presented higher concentrations of zinc-oxide. Target Canal Sealer and Endo fill based-OZE cements, showed barium sulfate and bismuth carbonate in the composition. Endométhasone N cement presented only barium sulfate and Pulp Canal Sealer, metal silver. Bismuth oxide, calcium hydroxide, titanium dioxide and iron oxide were showed in the based-resin/calcium hydroxide (Sealer 26). Both of MTA cements tested, Endo CPM Sealer and Obtura, presented calcium silicate. However, barium sulfate and calcium carbonate was found in the Endo CPM Sealer and magnesium silicate and calcium hydroxide in the Obtura. Regarding to the formaldehyde, all root-canal sealers tested showed this substance after took mixed. It was concluded that: 1) there was a great difference among present results and manufacturer´s composition for almost all materials. This was notobserved for MTA root-canal sealers; 2) although no manufacturer has indicated the formaldehyde presence in their material composition, this component was verified in all materials tested

ASSUNTO(S)

endodontia endodontics

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