Citation Information :
Fulsundar PD, More V, Bhadekar R, Bhola J. Comparative Evaluation of Ozonated Water and 0.5% Sodium Hypochlorite for their Effect of Disinfection and Surface Wettability on Polyvinyl Siloxane Impression Material. World J Dent 2022; 13 (S1):S3-S7.
Aim: To evaluate and compare the disinfection of polyvinyl siloxane (PVS) impression material using ozonated water and 0.5% sodium hypochlorite (NaOCl) and their effect on surface wettability.
Materials and methods: Fifty circular disks of PVS impression material were fabricated. The samples were divided into three groups group A (20), group B (20), and group C (10). The samples from group A (20) were treated with ozonated water at room temperature for 10 minutes, and samples from group B (20) were treated with NaOCl (0.5%) at room temperature for 10 minutes. Samples of group C (10) were neither contaminated nor disinfected and were used as a control for microbial enumeration and surface wettability. The contact angle goniometer was used to determine the surface wettability using the sessile droplet technique. The plate count technique was used for microbial enumeration.
Results: The treatment group with 0.5% NaOCl showed greater contact angle values which indicate decreased surface wettability, while the treatment group with ozonated water showed comparatively lesser contact angle values indicative of a very slight change in surface wettability of PVS impression material.
Ozonated water and 0.5% NaOCl showed negligible colony-forming unit (CFU) count indicative of inhibition of bacterial colonies of Streptococcus mutans, Lactobacillus salivarius, and Staphylococcus aureus on PVS impression material.
Conclusion: Treatment with ozonated water can significantly reduce microbial count on PVS impression material without a substantial alteration in surface wettability.
Clinical significance: Along with the inactivation of microorganisms, disinfection procedures must guarantee that the hydrophilicity of the impression material remains unaltered to facilitate complete surface detail reproduction on the poured casts. As a consequence, more research is necessary to assess the impact of ozonated water on surface properties of various impression materials.
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