Losing your baby teeth is a normal part of growing up.
It typically happens between 5-7 years of age, to make room for the incoming adult teeth.
The permanent tooth buds are located above and below the baby teeth, and they push against the roots of the baby teeth causing them to fall out. This process also helps to guide the permanent teeth into the proper position.
It would look a little scary if we could see inside our skulls during the development of our permanent teeth.
But nature doesn't always go according to expectations.
Zak Brown, from Wakefield, West Yorkshire, is known to his friends as "Jaws."
He's a sweet kid, and loves soccer like his peers, but while his brother and sister cashed in from the Tooth Fairy, Zak's permanent teeth began to emerge behind his baby teeth.
The condition is known as pediatric shark teeth, and can affect as many as one in 10 children although few cases are as striking as Zak's.
It doesn't hurt, and he has no trouble eating, although it has started to affect his speech, and he has to take extra care to maintain both sets of teeth. He finally lost a tooth, but will need orthodontic care to remove the rest. He will most likely need braces correct his bite.
For now, he has to wait until he moves up on the waiting list to see the orthodontist.