Comparative Evaluation Of Dimensional Accuracy And Surface Detail Reproduction Of Eugenol Vs Eugenol Free Zinc Oxide Impression Paste: An Invitro Study

Abstract

Purpose:  Surface detail reproduction and dimensional accuracy of secondary impression plays a major role in success of complete denture fabrication. Lack of precision in the duplication process will eventually have a hostile effect on the adaptation of the final restoration. Most commonly used final impression material is zinc oxide eugenol paste. Conventional pastes contain eugenol and eugenol free pastes are available too.This in vitro study was planned to evaluate and compare the dimensional accuracy and surface detail reproduction of zinc oxide eugenol and eugenol free impression materials.

Materials and Methods: Three different zinc oxide eugenol impression pastes DPI, Denzomix, Neogenate (Septodont) and two eugenol free impression pastes Cavex outline and Image were used to make samples. Total of 100 samples with 20 samples for each group were made. A standardized stainless steels die, similar to that described in ANSI/ADA Specification No. 19 was used .The die was scored with three horizontal and two vertical lines of 0.02 mm width and used for impression making.

Results: Statistically significant difference [P<0.001] was found in dimensional accuracy with least dimensional error was found in Cavex outline (0.281mm) and Septodont (0.285mm) followed by Denzomix (0.386mm), DPI (0.497mm) and  Image (0.748mm). Maximum surface detail reproduction was shown by Septodont (95%) followed by Cavex outline (85%), Denzomix (80%), DPI ( 60%), Image(55% ) [ p = 0.01].

Conclusion: The most dimensionally accurate material is Cavex-Outline which is zinc oxide eugenol free material and best surface detail reproduction was shown by Septodont.