Purpose: The purpose of this study was to evaluate the effect of different impression materials on replicating a cast for the fabrication of an implant retained auricular prosthesis.
Materials & Methods: A two implant abutment acrylic mold was made on which a reference Hader bar was fabricated. Thirty two impressions were made using four elastomeric impression materials Multisil Epithetek®, Flexitime®, Take 1 Advanced® and Impregum®. Impressions were casted with type IV dental stone and subjected to Sheffield's test with the reference bar. The vertical gap discrepancy was evaluated under the travelling microscope.
Results: Two-way ANOVA showed statistical difference (p=0.000) among the four impression materials Multisil Epithetek® (34.9967µm), Flexitime® (38.0983µm), Take 1 Advanced® (19.9917µm) and Impregum® (26.1317µm) and no difference (p-0.638) in vertical gap distances among the two abutments. Multiple comparison Tukey HSD test was conducted among the impression materials.
Conclusions: From this study it was concluded that monophase VPS impression material Take 1 Advanced® and Impregum® polyether impression material produced the most accurate master casts for the fit of Hader bar.