Estabilidade dimensional dos moldes de poliéter e polissulfeto obtidos com a técnica do casquete de acrílico, vazados em gesso pedra especial tipo IV e V

Maria Cechinel Alves, Carlos Renato Soares, Izo Milton Zani

Abstract



O propósito deste estudo foi verificar o comportamento de moldes de polissulfeto (Permlastic)
e poliéter (Impregum Soft) obtidos por meio da técnica do casquete de resina acrílica. Avaliouse
a estabilidade dimensional dos moldes confeccionados de uma matriz metálica contendo
dois preparos protéticos, com diâmetros e alturas diferentes. Os moldes de cada material foram
vazados com gessos pedra IV (Vel-mix) e gesso pedra V (Exadur), perfazendo um total de
quatro combinações experimentais: (polissulfeto/gesso-pedra IV, polissulfeto/gesso-pedra V,
poliéter/gesso-pedra IV e poliéter/gesso-pedra V). Os troquéis de gesso foram mensurados com
um paquímetro digital, 24 horas após sua obtenção. Os resultados obtidos foram submetidos a
ANOVA a 5%. Pode-se concluir que os moldes de poliéter vazados com gesso pedra tipo V apresentaram
melhor estabilidade dimensional em relação às outras condições experimentais.

UNITERMOS: troquéis de gesso; material de moldagem; alteração.

SUMMARY

The aim of this study was to evaluate the dimensional variation of polysulfide (Permlastic)
and polyether (Impregum Soft). It were evaluated the dimensional stability of the impressions
prepared of a model metallic with two abutments prepared; with differents diameter and
height. The impressions each material were pouring with stone IV (Vel-mix) and stone V
(Exadur). The experimental was divided into four conditions (polysulfide/stone IV, polysulfide/
stone V, polyether/stone IV and polyether/stone V) the stonies dies were mensured with an
digital calipter, 24 hours after their building. The results obtained were computed with the
analysis of variance method. It was concluded that the polyether impression pouring with
stone type V was more stability dimensional than others experimentals conditions.

UNITERMS: stone dies; impression material; alterations.

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e-ISSN: 1980-6523

ISSN-L: 0102-9460

 

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