THE COMPARATIVE EVALUATION OF THE DIMENSIONAL ACCURACY OF AN ALGINATE AND IMPROVED ALGINATE WITH THAT OF THE ELASTOMER IMPRESSION MATERIAL — AN IN VITRO STUDY

The main aim of the study was to compare the dimensional accuracy of alginate with that of improved alginate, and the dimensional accuracy of improved alginate with that of Elastomer. In this study three different types of materials were taken which includes the alginates, improved alginates and elastomers. The frasaco (Germany) maxillary dentulous model was selected and reference making of one mm in diameter made on the buccal cusps of first premolar and mesio buccal cusps of first molar using round diamond bur. The frasaco model was mounted on the phantom head and using each group 14 impression was made. Expectable impressions were poured with type 4 die stone. Measurements were made between 4 reference points. Readings were taken using Nikon profile projector microscope (Japan) .The reading were obtained and subjected to statical analysis. The result of this vitro study showed that improved alginate better than alginate. But the elastomers are the still m ore accurate. So the further studies are required to co relate this study clinically.