To compare the dimensional accuracy of dies obtained by using different impression techniques - An in vitro study

Abstract Introduction: This in-vitro study was undertaken to compare the dimensional accuracy of dies obtained with different impression techniques. Objectives 1. To compare dimensional accuracy of dies obtained with putty reline technique. 2. To compare dimensional accuracy of dies obtained with multiple mix technique. 3. To compare dimensional accuracy of dies obtained with medium body technique. Materials and Methods: Vinyl polysiloxane in putty, heavy body, medium body and light body consistency were used. A stainless steel die with specific dimensions was used for making the samples. Two indentations were made on the top and lateral side of the die. 60 samples were made with putty reline technique, multiple mix technique and medium body technique. Three readings were recorded for each sample and average of the three were compared amongst themselves. Linear measurements were done using profile projector. Data was collected and analysed statistically. Results: Study showed that the dimensional accuracy of dies obtained from monophase technique showed least significant difference from the master die followed by the multiple mix technique and putty reline technique.