Abstract

DOS SANTOS SOUSA, Rodrigo Luiz; SARKIS DOMITTI, Saíde  and  CONSANI, Simonides. INTERACTION EFFECT OF FLANKING PLASTER STONE AND POST-PRESSING TIME IN COMPLETE DENTURE BASE ADAPTATION. Acta odontol. venez [online]. 2004, vol.42, n.3, pp.160-164. ISSN 0001-6365.

This study evaluated the complete maxillary denture base adaptation under the effect of the flasking plaster combination ( II x III and III x IV types) and post-pressing time (immediate and 24 hours). The bases were made with Classic heat cured acrylic resin, polymerized in water bath at 74°C for 9 hours. The casts were made with type III plaster stone and the bases made with two wax plates in 0.9 mm. After the bases procedure by the routine technique, the stone cast and the resin bases were fixed with instantaneous adhesive and then transversally sectioned in three zones corresponding to distal of canine, mesial of first molars, and posterior palatal region. The adaptation level was measured in an Olympus linear comparator microscope, with accuracy of 0.0005 mm. The data were submitted to the ANOVA and Tukey’s test (5%). The results showed that the combination of plaster types II x III and post-pressing time of 24 hours presented better adaptation level (0.184 mm) with statistical significance when compared to the II x IV interaction (0.228 mm). In the immediate time, the results were with no significant statistically difference for all interactions (II x III=0.266 mm and II x IV=0.250 mm). The largest and smallest adjustment was in the posterior palatal (0.285 mm) and in the distal of canine teeth (0.179 mm), respectively. The authors concluded that the interaction of flasking plaster stone and post-pressing time promoted significant influence on the complete maxillary denture base adaptation, only in the 24 hours period for the stone III x IV combination.

Keywords : Denture Base; Post-pressing; Plaster Stone; Adaptation.