APAPRO Desensitizer Homecare (Remineralizing Anti-sensitivity Toothpaste)

APAPRO Desensitizer Homecare is a fluoride-free, daily-use toothpaste containing hydroxyapatite that relieves tooth sensitivity from cold, heat, acids, sweets, or contact. It works by depositing a hydroxyapatite layer on tooth surfaces to occlude exposed dentin tubules and promote remineralization, providing desensitization through physical occlusion rather than chemical blockade.

Both the subject device and predicate use hydroxyapatite to occlude dentin tubules, but the subject has a somewhat lower hydroxyapatite concentration. The subject is designed for daily over-the-counter use with a toothbrush, whereas the predicate is a professional in-office paste applied with cotton swab or rubber cup. Both are non-sterile, biocompatible, fluoride-free formulations with 3-year shelf lives.

ISO 10993 biocompatibility testing (referenced for predicate device); American Dental Association (ADA) recommended procedure for toothpaste abrasivity determination; Scanning electron microscopy (SEM) for dentin tubule occlusion evaluation.

APAPRO Desensitizer Homecare is substantially equivalent because it shares the same mechanism of action (hydroxyapatite deposition for dentin tubule occlusion), comparable effectiveness (93.1% occlusion rate vs. predicate's 91.5–93.2%), identical classification and product code, same indication for sensitivity relief, and biocompatible formulation with established safe-use history. The lower hydroxyapatite concentration and OTC delivery format do not raise new safety concerns.