European Journal of Prosthodontics and Restorative Dentistry

An Investigation into the Accuracy of Two Currently Available Dental Impression Materials in the Construction of Cobalt-Chromium Frameworks for Removable Partial Dentures

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Cover Date

March 2015

Print ISSN

0965-7452

Vol

23

Issue

1

Abstract

doi: 10.1922/EJPRD_1367Dubal13

An Investigation into the Accuracy of Two Currently Available Dental Impression Materials in the Construction of Cobalt-Chromium Frameworks for Removable Partial Dentures
Rajesh Kumar Dubal, Tim Friel, Philip D. Taylor

Abstract
This study investigated the suitability of irreversible hydrocolloid as an impression material for cobalt-chromium framework construction. Scans of casts derived from (1) alginate and (2) addition-cured polyvinylsiloxane impressions were superposed on to a control. The differences within and between groups were compared at fixed landmarks. The investigation revealed a high degree of scan coincidence within and between groups. However, certain features, such as undercuts, resulted in a lower degree of scan coincidence. Irreversible hydrocolloid appears to be a viable alternative to addition-cured polyvinylsiloxane as an impression material for cobalt-chromium framework construction.
Keywords
Impression, Alginate, Silicone, Accuracy, Dentures