Evaluation of dimensional accuracy of two step putty wash impression technique using different spacers

Abstract

Purpose- To investigate the accuracy of impressions taken by two step putty wash impression technique using various spacers. Materials and methods – A maxillary typodont teeth assembly was taken as the master model with missing right maxillary first molar and prepared 2nd premolar and molar. The inter abutment, premolar and molar height measurements were recorded using Digimatic Indicator (Mitutoyo) and Tool maker microscope (Hauser P32C). Impression (Flexceed GC India Dental Pvt Ltd) was taken using the two step putty wash impression technique using four different types of spacer protocols, GROUP 1- No spacer; GROUP 2- Cellophane sheath; GROUP 3- Antero-posterior rocking with escape groves; GROUP 4- Shimstock articulating paper. All the impressions were poured with type IV dental stone (Kalrock Kalabhai Dental Pvt Ltd) with base. These dies were examined for any irregularities or porosities and the fine dies were selected. The molar and premolar heights were measured using Digimatic Indicator (Mitutoyo) and the inter-abutment height was measured with tool maker microscope (Hauser P32C). The data was collected and statistically analysed. Result- When coming to inter-abutment, premolar and molar height distance there was significant difference.