Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/53485
Title: Relationship of viscosity to porosities in automixed elastomeric impressions
Authors: Soh, G. 
Chong, Y.H. 
Issue Date: 1991
Source: Soh, G.,Chong, Y.H. (1991). Relationship of viscosity to porosities in automixed elastomeric impressions. Clinical Materials 7 (1) : 23-26. ScholarBank@NUS Repository.
Abstract: Porosities commonly presenting as voids have been recognized as an inherent problem in elastomeric impressions. Automixing of the impression has been found to be effective in reducing voids. The purpose of this study was to compare formation of voids in medium-viscosity and putty-wash materials in four automixed addition silicone elastomers. Impressions of a master model were made according to manufacturers' recommendations on manipulation of materials. Voids presenting on a predetermined surface were counted under a binocular microscope at a magnification factor of 7 x. Results showed that Express exhibited a significantly higher number of voids than other materials in both categories. Putty-wash impressions generated significantly less voids than medium-viscosity impressions for all materials except Reprosil. The findings of this study suggested that putty-wash impressions produced significantly less porosities than medium-viscosity impressions and, consequently, offer better tear strength for impressions.
Source Title: Clinical Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/53485
ISSN: 02676605
Appears in Collections:Staff Publications

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