not as much as you think. It actually happens quite often. when it does, you treat that tooth as a permanent tooth and fill cavities. You can even crown a baby tooth if there is no permanent tooth underneath it. If you have a permanent tooth under it, they usually extract the baby tooth.
I have heard a tooth infection can infect your brain if left untreated. But it is supposed to be very rare.
This is not an idiom, so it means what it says. Something is as rare or hard to find as teeth on a female chicken (or any chicken) - chickens are birds, and do not have teeth.
That is a rare complication called "subcutaneous emphysema".
It is unknown how rare a fifth wisdom tooth is, however, many people end up growing extra teeth. Some believe that this is proof of evolution due to the mouth being larger in primitive times.
Dinosaur teeth can be very rare and valuable in today's economy. A large sized dinosaur tooth could be sold to a museum for a lot of money.
hardly ever. only on rare and very advanced situations
yes they can it is very rare though but if they hit it good it can actually chip
It depends on how old the tooth is,but other than that,unless it's a rare shark,it wouldn't make a very good index fossil.
The plural form for the noun chicken is chickens; the plural possessive form is chickens'.
Yes. If there isn't a roster in the flock already then it isn't rare for a hen to turn into a rooster. They even cock-a-doole-do. I have had two hens turn into roosters because the rooster got eaten by a fox... lol
Double yolks are not that rare. Double yolks are a result of two ovum being released to the hens oviduct at the same time.