Which category of dental instruments includes forceps, scalers, and burs and requires sterilization because they penetrate sterile tissues?

• A. Critical instruments
• B. Semi-critical instruments
• C. Non-critical instruments
• D. Instruments that do not contact tissues

Answer: (A)

Infection-control classification hinges on the risk of introducing pathogens into sterile parts of the body. Critical instruments are those that enter sterile tissues or the bloodstream, so they must be sterilized after every use. Forceps used for tooth extraction definitely breach soft tissue and can reach bone, making them classic critical instruments. Burs are used to drill into teeth and can access the pulp and surrounding sterile spaces; if contaminated, they could introduce infection, so they also require sterilization between patients. The idea behind labeling these as needing sterilization is this potential to enter sterile tissues. In contrast, semi-critical instruments contact mucous membranes or non‑intact skin and are typically treated with high-level disinfection rather than full sterilization, while non-critical instruments touch only intact skin or non-contact surfaces.