enamel
Enamel forms the hard outer layer of the visible tooth. This topic is part of Human Body within Science & Nature. This page currently draws on 9 supporting questions, with answers and bonus facts available below.
enamel trivia questions
Tooth enamel covers what part of a tooth?
Answer: Crown
Bonus fact: Enamel forms the hard outer layer of the visible tooth.
What is the hardest substance in the human body?
Answer: Tooth enamel
Bonus fact: Enamel is highly mineralized.
Enamel is composed mostly of crystals of what mineral?
Answer: Hydroxyapatite
Bonus fact: Hydroxyapatite is a calcium phosphate mineral.
Fluoride helps enamel partly by promoting formation of a more acid-resistant mineral called what?
Answer: Fluorapatite
Bonus fact: Fluorapatite is less soluble in acid than ordinary hydroxyapatite.
Which body part contains enamel, the hardest substance in the human body?
Answer: Teeth
Bonus fact: Tooth enamel protects the outer surface of a tooth.
What hard outer layer covers the crown of a tooth?
Answer: Enamel
Bonus fact: Enamel is the hardest substance in the human body.
Fluoride is added to some toothpaste mainly to help prevent what?
Answer: Tooth decay
Bonus fact: Fluoride strengthens tooth enamel and reduces cavities.
What color are the large visible incisors of a North American beaver?
Answer: Orange
Bonus fact: The orange color comes from iron in the enamel, which helps strengthen the teeth.
Why do beaver incisors appear dark orange?
Answer: Iron in the enamel
Bonus fact: The iron-rich enamel helps strengthen the teeth against cracking and breaking.