Estabilidade dimensional de modelos obtidos com poliéter e silicone de adição após desinfecção com ácido peracético e hipoclorito de sódio

AUTOR(ES)

Frederico Emygdio Cabral de Vasconcellos

FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

01/07/2008

RESUMO

The disinfection of dental impressions is an important procedure to prevent cross infection on dental office. The aim of this study was compare the dimensional stability of models obtained of three impressions materials after disinfection with 1% sodium hypochlorite and 0,2% peracetic acid (Sterilife, Lifemed). A master model with points at first right molar, first left molar, left central incisor and right central incisor was used. Five impressions was made with polyether (Impregum Penta, 3M-ESPE), five with addition silicone light and heavy body (Express Penta, 3M-ESPE) and five with addition silicone light and putty body (Express, 3M-ESPE) for each impression material and each disinfectant and five impressions of each material were not disinfected, for control group. The impressions were disinfected by immersion for 10 minutes to each disinfectant. Casts were formed in Type IV gypsum (Durone, Dentsplay). Measurements of posterior cross arch, right anteroposterior, anterior cross arch and left anteroposterior was made with STM Olympus microscope. The results statically treated (Kruskal-Wallis) showed no differences between groups in all measurements, except in posterior cross arch measure between groups disinfected with sodium hypochlorite (groups of polyether (0,1203% 0,0442) and addition silicone light and heavy body (0,0350% 0,0158)) and between groups disinfected with peracetic acid (groups of polyether (0,1345% 0,1059) and addition silicone light and heavy body (0,0264% 0,0302)) ( groups of addition silicone light and putty body (0,1054% 0,0419) and addition silicone light and heavy body(0,0264% 0,0302)). The impression materials used in present study showed excellent dimensional stability after disinfection by immersion in sodium hypochlorite or in peracetic acid.

ASSUNTO(S)

materiais de moldagem desinfecção ácido peracético hipoclorito de sódio impression materials disinfection peracetic acid sodium hypochlorite odontologia

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