The Journal of the Japanese Society for Dental Materials and Devices
Online ISSN : 2188-4188
Print ISSN : 0286-5858
ISSN-L : 0286-5858
Original Article
Disinfection of Impressions in Dental Treatment for Elderly Patients at Home : Effect of W/P Ratio of Alginate Impression Materials on the Dimensional Accuracy and Deformation of Stone Models
Hisako HIRAGUCHIHisami NAKAGAWAHirobumi UCHIDANaoki TANABE
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2002 Volume 21 Issue 6 Pages 313-322

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Abstract
As part of our study about the disinfection of impressions in dental treatment of elderly patients at home, the present study investigated the effect of immersion disinfection of alginate impressions on the dimensional accuracy and deformation of edentulous working casts in relation to the W/P ratio of alginate impression materials. Two types of alginate impression material : AROMA FINE DF III (AF III) and Jeltrate Plus (JLP), characterized by smaller or greater dimensional changes in water, were used. Impression materials were mixed at the following W/P ratio : manufacturers' instructions (std), std-0.2, and std+0.4. Impressions were immersed in 1% sodium hypochlorite solution for 10 min (1 SH), 2% glutaraldehyde solution for 30 min (2 GA), or they were not immersed in any disinfectant solutions as a control. The W/P ratio had no effect on the dimensional accuracy and deformation of edentulous working casts obtained from AF III impression disinfected by 1 SH processing.
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© 2002 The Japanese Society for Dental Materials and Devices
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