Curious Kids: My tooth fell out. Why is it so spiky on the bottom?
- Written by David Manton, Professor of Paediatric Dentistry, University of Melbourne
The edges of your lost tooth are sharp because when the root of the baby tooth is being eaten away, it tends to start from the middle of the root. That leaves a sharp edge behind when the tooth breaks off.Flickr/Stephanie Young, CC BY-SAThis is an article from Curious Kids, a series for children. The Conversation is asking kids to send in...




