Dimensional accuracy of thermoplastic impression material Adaptol. Part 2. Comparison with other impression materials by computer simulation

Abstract

The purpose of this study was to compare the dimensional accuracy of thermoplastic impression material Adaptol with that of other impression materials by computer simulation. The impression materials used for comparison with Adaptol were polysulfide rubber base and irreversible hydrocolloid impression material. To investigate the accuracy of impression material, master model and standard plaster model which adapted accurately to master model were used in this study. After taking impression of m ster model with each kind of impression material, stone casts were made. Then the contour of stone casts and the standard plaster model were measured with profile projector and the data of the measurement were recorded with personal computer. Vertical displacements by placing the standard plaster model on stone casts were measured with personal computer. The following results were obtained.Adaptol indicated same degree of accuracy with polysulfide rubber base impression material and indicated better accuracy than irreversible hydrocolloid impression material.