Abstract
Effect of Disinfection on the Surface Roughness of Dental Casts Retrieved from Addition Silicone Impressions
Highlights
Background and aimChanges in the physical properties of casts retrieved from disinfected impressions are a common problem in the fabrication of dental prostheses
Most of the previous studies are focused on these characteristics, while very few studies have evaluated the effect of disinfectants on the surface roughness of dental casts.[9,16] this study aimed to assess and compare the surface roughness of casts retrieved from addition silicone impressions disinfected with 1% NaOCl, 2.4% glutaraldehyde, and 5% povidone-iodine by immersion for 5 and 30 minutes
Two-way analysis of variance (ANOVA) showed that over time, the surface roughness of the casts retrieved from silicone impressions disinfected by immersion decreased (P=0.002), but no significant difference was noted between the disinfectants (P=0.243)
Summary
Background and aimChanges in the physical properties of casts retrieved from disinfected impressions are a common problem in the fabrication of dental prostheses. There are limited data available about the effect of disinfecting solutions on the surface roughness of casts. This study aimed to assess the surface roughness of casts retrieved from addition silicone impressions disinfected by immersion in three different disinfectants for 5 and 30 minutes. Results: One-way ANOVA showed a statistically significant difference between the control group and the other 6 groups (P=0.004). 1% NaOCl/5 minutes was the only group which presented a different result from the control group (P=0.012). Two-way ANOVA showed that over time, the surface roughness of casts retrieved from silicone impressions disinfected by immersion in a disinfectant decreased (P=0.002), but no significant difference was noted between the disinfectant agents (P=0.243). Conclusion: The type of the disinfectant had no significant effect on surface roughness, an increased duration of disinfection decreased the surface roughness of casts
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