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Quintessence Publishing: Journals: QI
Quintessence International

Edited by Eli Eliav

ISSN 0033-6572 (print) • ISSN 1936-7163 (online)

March 2008
Volume 39 , Issue 3

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The influence of different disinfectants on primary impression materials

Jens Johannes Bock, DDS/Robert Andreas Werner Fuhrmann, DDS/Jürgen Setz, DDS

Page: 264 PMID: 18618030

Objective: To investigate the dimensional changes and the surface quality of dental impression materials after disinfection with 3 chemically different agents. Method and Materials: Four alginate impression materials and 1 addition silicone material were selected. The impressions were made from a brass model simulating a 3-unit fixed partial denture. The chemical disinfection was performed with 3 different disinfectants for 10 minutes. Three samples of each impression material and disinfectant agent were investigated. As a control, 3 impressions of each material were made without any disinfection. The casts were made with a type IV dental stone. For each cast, 6 diameters and 3 distances were measured. To evaluate the dimensional stability, measurements were taken at a magnification of 343 with a light microscope. The surface quality was recorded using a profilometer. Results: The dimensional change and surface quality differed minimally; however, statistically significant differences were found between alginate and addition silicone impression materials (ANOVA, P < .05). Casts from the silicone impressions were more accurate than the casts from alginate impressions. Conclusion: Different impression disinfection methods have only a marginal influence on dimensional stability and surface quality of dental casts. To achieve a higher precision, the use of an addition silicone can be recommended. (Quintessence Int 2008;39:264)

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