Which of the following is NOT classified as a critical item?

The classification of items used in dental settings is based on whether they are critical, semicritical, or noncritical. Critical items are those that penetrate soft tissue or bone, and they must be sterilized before use to prevent infection. In this context, bite blocks are not classified as critical items because they do not penetrate tissues but rather come into contact with mucous membranes. They are considered semicritical items, as they should be thoroughly cleaned and can be disinfected between uses but do not require sterilization in the same manner as critical items.

In contrast, scalpel blades, forceps, and needles are considered critical items because they are used for invasive procedures. They can cause exposure to blood and potentially carry pathogens, therefore necessitating complete sterilization to ensure patient safety.