Silver diamine fluoride (SDF) is a liquid substance used to help prevent tooth cavities (or caries) from forming, growing, or spreading to other teeth.

SDF is made of:

  • silver: helps kill bacteria
  • water: provides a liquid base for the mixture
  • fluoride: helps your teeth rebuild the materials they’re made of (known as remineralization)
  • ammonia: helps the solution remain concentrated so that it’s maximally effective against cavity resonance.


    1. Cotton or gauze is placed near the affected teeth to prevent saliva from moistening the teeth.
    2. Moisture is removed from the surface of the teeth using a vacuum suction tool.
    3. SDF is applied to the area affected by a cavity.

    Your dentist may also use the following to mask the areas affected by cavities:

    • glass ionomer
    • opaquer
    • crowns

    SDF is most commonly used on areas affected by cavities. Research shows that SDF can be just as helpful when used as a preventive measure by being applied to healthy tooth surfaces.

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