INBDE (Integrated National Board Dental Examination) Practice Exam

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What sterilization method is best for glass or metal objects?

Ethylene oxide
Glutaraldehyde
Pressure sterilization
Dry heat sterilization

The correct answer is: Dry heat sterilization

Dry heat sterilization is the best method for glass or metal objects because it is effective in penetrating the material and killing microorganisms without causing corrosion or dulling of sharp instruments. Dry heat sterilization works by oxidizing proteins, causing irreversible damage to microorganisms. This method is particularly suitable for items that are heat-stable but sensitive to moisture, such as glass or metal objects. Option A, Ethylene oxide, is a gaseous sterilization method often used for heat-sensitive materials. Option B, Glutaraldehyde, is a liquid chemical sterilization method that is effective for heat-sensitive semi-critical instruments. Option C, Pressure sterilization, typically refers to autoclaving, which uses steam under pressure to sterilize items, but may not be the best choice for delicate instruments like glass or certain metals.