What is the first action a dental assistant should take when experiencing accidental exposure on the skin from a contaminated source?

Washing the exposed skin with soap and water is the appropriate first action when experiencing accidental exposure to a contaminated source. This initial step is crucial because it helps to physically remove contaminants and reduce the risk of infection. Soap and water are effective in cleansing the area and minimizing the likelihood of any pathogens entering the body through the skin.

While notifying a supervisor, applying an antiseptic, and documenting the incident are important steps that should follow, they do not substitute for the immediate need to clean the area of exposure. Taking prompt action to wash the skin helps to mitigate potential health risks associated with contaminants before any further actions are taken.