Shark teeth contain natural 'toothpaste'

The video explains that shark teeth contain fluoride, similar to the active ingredient in toothpaste, which makes them resistant to decay. Unlike human teeth, which have hydroxyl appetite, shark teeth have fluoral appetite. This mineral composition makes shark teeth structurally similar to human teeth, both having hard enamel and soft dentin inside.

What percentage of hydroxide is replaced by fluoride in human teeth when brushing?

• Less than 1%

• About 50%

• More than 90%

• None

Describe the material found inside shark teeth.

• Bone

• Dentin

• Enamel

• Fluoride