Sometimes a baby tooth gets knocked out or has to be removed due to dental disease. Do you need to replace the missing baby tooth? If the missing tooth is in the back, you will likely need a space maintainer to "hold" the space till the permanent tooth erupts. It's not really a fake tooth but acts like a tooth to hold space. What about that ugly space right there in the front?
If the missing baby tooth is in the front, you really don't need a space maintainer. Can't you make a partial with a fake tooth on it for looks? Well, you can but you don't have to. There are several types of "Pediatric Partials" to replace knocked out baby teeth. The normal time a front permanent tooth takes to come in varies, but is usually around seven years old. So, if your three year old has lost his tooth early, he will be without something there for about three or four years. Does he care? No, probably not. He can eat and speak just fine even with all four front baby teeth gone. It's us parents that get all bent out of shape over the appearance of the teeth.
These partials are more difficult to do of there is not a lot of room between the gums and the bottom teeth or other related concerns. It is somewhat difficult to take care of these things, but most kids do well. I usually only do these on "cooperative" patients. Keep in mind that kids are rough on their teeth and they are rough on things like this partial. Many times I see the fake teeth get broken off or some other kind of problem. The younger the child the more likely there will be a problem. For these reasons and others, I do not do many "partials" like this.
Here are a couple of photos of different kinds of pedo partials. You can do one tooth or up to about four teeth. In fact I think it looks better when you have more than one tooth because there is not just one tooth that stands out as being "fake". It is attached to the back baby teeth with orthodontic bands. The partial is removed when the new teeth are ready to erupt.
Here's one in place (the fake teeth are the upper four middle teeth):