Silver Fluoride Hypersensitivity Varnish

Young Silver Fluoride Hypersensitivity Varnish is a dental treatment formulation containing silver, sodium fluoride, chitosan, acetic acid, and purified water. It is applied topically by dental professionals to treat dental hypersensitivity in adults by physically occluding exposed dentinal tubules, with treatment requiring 1–2 applications separated by one week if needed.

Both the subject device and predicate (Elevate Advantage Arrest) contain silver and fluoride to occlude dentinal tubules. The key difference is that the subject device uses acetic acid and chitosan to disperse the solution and includes small silver particles to facilitate tubule entry, whereas the predicate uses diamine (ammonia). Both are single-step varnishes applied topically; the subject treats up to 8 sites per drop versus 5 sites for the predicate.

ISO 10993 (biocompatibility testing including cytotoxicity, sensitization, irritation, oral toxicity, and genotoxicity); ASTM D4169 Schedule 13 (transportation/shipping conditions).

Although the subject device uses acetic acid and chitosan instead of ammonia for solution dispersion and has a different pH profile (acid versus strong base), these differences do not affect the fundamental mechanism of action—physical occlusion of dentinal tubules via silver and fluoride release. Bench testing demonstrated that the subject device achieves dentinal occlusion and releases silver and fluoride ions comparably to the predicate. Biocompatibility testing confirmed safety, and the lower maximum application frequency (up to 2 versus 3 applications) further supports safety parity.