NEW YORK, US: Silver diamine fluoride (SDF) has clearance by the US Food and Drug Administration for treatment of tooth sensitivity, and there is strong research interest in its off-label use to arrest dental caries. A study at the New York University College of Dentistry has now compared the efficacy of SDF with that of dental sealants as a primary intervention for the prevention and control of caries and found that it achieved comparable results in school-based caries prevention. According to the study authors, SDF presents a faster, less expensive treatment option that could reduce the need for invasive tooth preparation.