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
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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