The influence of different disinfectants on primary impression materials.
OBJECTIVE
To investigate the dimensional changes and the surface quality of dental impression materials after disinfection with 3 chemically different agents.


METHODS
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 34X 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.


CONCLUSIONS
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.
Bock
Jens Johannes
JJ
Department of Orthodontics, Martin-Luther-University Halle-Wittenberg, Halle/Saale, Germany. drbock@web.de
Fuhrmann
Robert Andreas Werner
RA
Setz
Jürgen
J
D000464:Alginates; D000704:Analysis of Variance; D001548:Benzalkonium Compounds; D019551:Dental Disinfectants; D003760:Dental Impression Materials / Q000737:chemistry*; D004203:Disinfection; D005976:Glutaral; D003765:Models, Dental; D012826:Silicone Elastomers; D018709:Statistics, Nonparametric; D013464:Sulfuric Acids; D013499:Surface Properties
D000464:Alginates; D001548:Benzalkonium Compounds; D019551:Dental Disinfectants; D003760:Dental Impression Materials; D012826:Silicone Elastomers; D013464:Sulfuric Acids; C048813:potassium peroxymonosulfuric acid; D005976:Glutaral