Accuracy of some Elastic Impression Materials Used in Prosthetic Dentistry

Volume 6 , Issue 2 , December 2019 , Pages 1-7

Authors

Fahd S. Ikram 1 ; Jawad M. Mikaeel 1 ; Ranj A. Omer 1

1 Department of Prosthodontics, College of Dentistry, Hawler Medical University, Erbil, Iraq.

DOI logo 10.17656/sdj.10090

Keywords

Abstract

Objective: Elastic impression materials considered favourable decision in fixed and removable prosthesis due to ease of use and
accuracy. High price tag is the main drawback. The purpose of this study was to evaluate surface detail reproduction and dimensional
stability of newly introduced 3M Preliminary Penta™ VPS in comparison to other elastic impression.
Methods: Alginate, alginate replacement and 3M light body were tested for surface detail reproduction and dimensional stability. Ten
samples were prepared for each using a stainless-steel die that was created according to ADA specification No. 18 and 19. Surface
detail was assessed directly after setting while dimensional stability was evaluated immediately and 24hr after. The data were analysed
using a paired sample t-test.
Results: All the samples were able to record 75μm line for surface detail. Surface record of 3M imprint™ 4 Preliminary Penta™ VPS
showed a similar result to light body. While alginate failed to reproduce 50μm and 20μm lines. Regards to dimensional stability, light
body resisted change with respect to time. In contrast, alginate revealed a significant effect (p˂0.05) on dimensional stability for the
same storage period while not a major effect was observed for alginate replacement.
Conclusions: Within the limitations of this study, it can be concluded that light body underwent less dimensional change than alginate
and alginate replacement. It also revealed a better replication of details. Alginate replacement was more stable during the storage period
with better surface detail record than alginate.

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  • Published at1 December 2019

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