The Effect of Hypochlorous Acid (HOCl) Solution with Different Concentrations and Durations on the Dimensional Stability of Alginate Impressions

Johanna Kezia Prajogo, Faizah Fulyani, Brigitta Natania Renata Purnomo, Oedijani Santoso


DOI: https://doi.org/10.14710/actodont.25989

Abstract


Background: Disinfection of alginate impressions is performed to prevent cross-infection. Alginate possesses properties of imbibition and syneresis which affect the dimensional stability of the impression. The disinfectant solution, hypochlorous acid (HOCl), is non-toxic, non-irritating, and non-corrosive at the appropriate concentrations. Hypochlorous acid has higher antimicrobial activity than sodium hypochlorite (NaOCl). Objective: This study aimed to determine the effect of spraying 0.01% and 0.02% HOCl with contact durations of 1 and 5 minutes on the dimensional stability of alginate impressions. Methods: This was a laboratory experimental study with a Post-Test Only Control Group Design. A total of 24 samples were divided into 4 treatment groups and 2 control groups. The dimensional stability of the alginate impressions was assessed by the difference in anteroposterior and mediolateral dimension measurements between the master model and the resulting gypsum casts, using a digital caliper. Measurements were taken 3 times by 3 different observers, followed by a two-way ANOVA statistical test. Results: The results of the two-way ANOVA test showed no significant difference between the groups with variations in concentration or contact duration. The largest dimensional difference was found in the control group sprayed with 5.25% NaOCl. Conclusion: Spraying alginate impressions with 0.01% and 0.02% HOCl with contact durations of 1 and 5 minutes does not affect the dimensional stability of the alginate impressions.


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