How should an alginate impression be disinfected?

Disinfecting alginate impressions is critical for infection control in dental practices. The correct method involves spraying the impression with an intermediate-level disinfectant. This approach effectively reduces the microbial load without compromising the integrity of the impression material.

Intermediate-level disinfectants are specifically designed to kill a wide variety of pathogens, including bacteria, viruses, and some fungi, making them suitable for use on non-critical surfaces in a dental setting. Spraying the impression allows for thorough coverage and contact time with the disinfectant, ensuring it can work effectively to reduce potential contaminants.

Soaking the impression in a bleach solution would not be advisable as it can alter the physical properties of the alginate, potentially leading to distortions or other inaccuracies in the impression. Steam sterilization is not appropriate for alginate because the high heat and moisture can also degrade the material. Rinsing with cold water alone does not provide adequate disinfection and only removes superficial debris, leaving pathogens that could pose a risk. Therefore, using an intermediate-level disinfectant via spray ensures that the impression is properly disinfected without damaging its quality.