During SDF application, which step supports preventing contact of the solution with soft tissues?

During SDF application, which step supports preventing contact of the solution with soft tissues?

• A. Isolate the tooth with cotton rolls
• B. Rinse immediately after application
• C. Apply SDF directly to adjacent soft tissues
• D. Leave the area unprotected around the tooth

Answer: (A)

Isolating the tooth with cotton rolls is the key step to protect soft tissues during SDF application. SDF is a liquid that can irritate or stain mucosa if it contacts the gingiva or oral soft tissues, and it may cause tissue injury with extended exposure. Placing cotton rolls helps create a dry, well-isolated field by absorbing saliva and preventing the solution from spreading to adjacent tissues. This targeted placement allows the clinician to apply SDF precisely to the lesion while keeping soft tissues out of contact. Rinsing immediately after might reduce residue but doesn’t actively prevent contact during application. Applying SDF directly to adjacent soft tissues would increase the risk of irritation and staining. Leaving the area unprotected around the tooth would likewise permit contact with soft tissues and potential injury.

Isolating the tooth with cotton rolls is the key step to protect soft tissues during SDF application. SDF is a liquid that can irritate or stain mucosa if it contacts the gingiva or oral soft tissues, and it may cause tissue injury with extended exposure. Placing cotton rolls helps create a dry, well-isolated field by absorbing saliva and preventing the solution from spreading to adjacent tissues. This targeted placement allows the clinician to apply SDF precisely to the lesion while keeping soft tissues out of contact.

Rinsing immediately after might reduce residue but doesn’t actively prevent contact during application. Applying SDF directly to adjacent soft tissues would increase the risk of irritation and staining. Leaving the area unprotected around the tooth would likewise permit contact with soft tissues and potential injury.