Avaliação da alteração dimensional de moldes de hidrocolóide irreversível submetidos à tècnica de reembasamento.
The aim of this study was to evaluate the dimensional changes in alginate molds when employing the technique of relining. From
a standard stainless steel, with two appointments were made with alginate impressions Ezact Kromm (Vigodent) and plaster casts
were made of gypsum type IV Durone (Dentsplay). The casts were divided into two groups: Group I – 10 impressions without
relining and Group II – 10 inpressions with alginate using the relining. The plaster casts were made with vacuum mixing and
taken to the Comparator Mitutoyo Microscope to obtain measures that were compared with the standard model of stainless steel.
The data were statistically analyzed by t test of Student and obtained the following results: there was a statistically significant
dimensional changes in Group II (p <0.05) compared with Group I and the standard model. It was concluded that it is not recom-
mended to perform the technique of relining impression with alginate in, because the dimensional changes observed.
Key words: Dental Impressions Materials