What is a notable cosmetic side effect of applying SDF that should be discussed with patients and caregivers?

• A. Whitening of teeth
• B. Staining of treated carious lesions
• C. No cosmetic change
• D. Increased translucency

Answer: (B)

The notable cosmetic side effect is staining of the treated carious lesions. Silver diamine fluoride works by delivering silver and fluoride ions to the decayed tissue; the silver ions interact with organic material and sulfides in the caries to form dark compounds, giving the lesion a black or dark brown color. This discoloration is a visible change that patients and caregivers should understand before treatment, especially since it is often more noticeable on front teeth. The benefit, however, is that SDF arrests decay in a simple, non-invasive way, which is why it’s used in many contexts. While whitening or no change would not describe the actual outcome, and increased translucency is not a typical result, the key point is this trade-off between effective caries arrest and esthetic staining. If esthetics are a primary concern, discuss alternatives or sequencing with the clinician.