Which item should not be used to cover surfaces prior to dental radiography?

Foam pads should not be used to cover surfaces prior to dental radiography because they are porous materials. Porous surfaces can harbor pathogens and make it difficult to maintain a sterilized or disinfected environment. Unlike non-porous materials, which can be easily wiped down or sealed, foam pads can absorb fluids and contaminants, potentially compromising infection control protocols in a dental setting.

In contrast, plastic barriers, disposable towels, and plexiglass covers are all designed specifically to protect surfaces from contamination during procedures. These materials can be easily cleaned, replaced, or disposed of, thus minimizing the risk of infection transmission in a dental office. Since dental radiography involves closely working with patients and equipment that must remain sanitary, using appropriate barriers is crucial for maintaining a safe environment.