human
Is there a way to determine a person's age by using their teeth?
assistant
Yes, there is. Teeth are made up of layers of dentin and enamel that can be used to estimate someone’s age. The deeper the layer of enamel, the older the person. Enamel forms in two distinct layers during development: primary and secondary. Primary enamel starts forming around 6 months after conception and continues until about 2 years old. Secondary enamel begins forming at around age 4 or 5 and continues until about age 14. So, if you have an adult who has all primary enamel, they would be about 2 years old. If you have an adult with all secondary enamel, they would be about 14 years old.