Final answer:
Fluoride is the component in silver diamine fluoride that aids in remineralization. It becomes incorporated into tooth enamel, making it more resistant to corrosive acids and enhancing calcium and phosphate uptake for remineralization.
Step-by-step explanation:
The component in silver diamine fluoride that aids in remineralization is fluoride. Fluoride is known to be the main active ingredient in toothpaste and is commonly added to tap water to promote oral health. It can become incorporated into the hydroxyapatite of tooth enamel, making it more resistant to corrosive acids produced by oral microbes. Fluoride also enhances the uptake of calcium and phosphate ions in tooth enamel, which promotes remineralization.