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.

Why don't shark teeth need additional fluoride treatment?

• They are not used as frequently as human teeth.

• They are made of a different material.

• They are brushed regularly by sharks.

• They are naturally coated with fluoride.

What mineral is found in shark teeth that differs from human teeth?

• Magnesium phosphate

• Calcium carbonate

• Fluoral appetite

• Hydroxyl appetite

How much of the hydroxide in human teeth is replaced by fluoride when brushing?

• None

• About 10%

• Less than 1%

• More than 50%

What is the hard outer layer of both shark and human teeth called?

• Dentin

• Cementum

• Enamel

• Pulp

What is the soft material found inside both shark and human teeth?

• Enamel

• Dentin

• Pulp

• Cementum