Disinfection of pumice

Area of Science:

• Dental materials science
• Microbiology
• Infection control

Background:

• Pumice is commonly used in dental laboratories for polishing dentures.
• Pumice can act as a reservoir for microorganisms, posing infection risks to dental technicians and patients.
• Cross-contamination between dentures and patients is a concern with conventional pumice use.

Purpose of the Study:

• To compare the antimicrobial efficacy of two pumice-disinfectant combinations against a conventional pumice-water mixture.
• To evaluate the reduction in microbial load under practical dental laboratory conditions.

Main Methods:

• A conventional pumice-water mixture was used as a control.
• Steribim, a pumice containing benzoic acid, was mixed with water.
• Conventional pumice was mixed with an antiseptic product containing octenidine.

Main Results:

• Steribim mixed with water reduced bacterial numbers by 99% compared to conventional pumice and water.
• The addition of an octenidine-based antiseptic to conventional pumice achieved a 99.999% reduction in microorganisms.

Conclusions:

• Pre-formulated pumice like Steribim offers substantial bacterial reduction.
• Antiseptic additives, particularly those with octenidine, provide superior microbial control in dental pumice.
• Implementing disinfectant strategies with pumice is crucial for improving dental hygiene and patient safety.