Comparative Evaluation of Ozone Water and Glutaraldehyde on Surface Detail Reproduction of Vinyl Polyether Silicone Impression Materials at Different Time Intervals.

Abstract

Objective: The study aims to evaluate the impact of chemical disinfection using ozone water and glutaraldehyde on the surface detail reproduction (SDR) of vinyl polyether silicone (VPES) impression material at different time intervals.

Methodology: VPES impressions were categorized into light-body and heavy-body groups and further divided based on the disinfectant used (ozone water or glutaraldehyde) and the time interval of disinfection (T1: 15 minutes and T2: 24 hours). A total of 80 impressions (40 light-body and 40 heavy-body) were prepared and subjected to the respective disinfection protocols. The SDR was evaluated using a standard scoring system to determine the quality of detail reproduction.

Results: Ozone water demonstrated superior performance in preserving surface detail compared to glutaraldehyde at both T1 and T2 for both light-body VPES and heavy-body VPES. Light-body VPES showed better SDR scores compared to heavy-body VPES across all conditions. Specifically, for light-body VPES, the mean SDR scores at T1 were significantly better for ozone water compared to glutaraldehyde (mean scores: 1.00 vs. 1.27, P = 0.046). For heavy-body VPES, ozone water also performed better at T1 compared to glutaraldehyde (mean scores: 1.27 vs. 1.67, P = 0.034). Disinfection at T1 resulted in better SDR scores compared to T2 for both light-body VPES and heavy-body VPES.

Conclusion: Ozone water is a more effective disinfectant than glutaraldehyde for preserving the surface detail of VPES impressions, especially when disinfection is conducted for a shorter duration (15 minutes).