My son fell and chipped his 2 top, front teeth shortly before he turned 2 years old. One of them was damaged and had to be pulled, the other was slightly chipped and they could fix it. I asked the dentist about putting in a fake tooth to replace the one they pulled and he said that kids his age don't do well with "fake teeth" because they are constantly damaging them (so we didn't bother).
Sure enough, a few months later, the chipped tooth that the dentist fixed got chipped again. We didn't bother fixing it this time around. The dentist said that as long as it doesn't hurt and he doesn't get a cavity in it, he should be fine until the tooth falls out on its own.
So I guess what I'm saying is that our pediatric dentist thinks that children at that age might be too young to be careful with "replacement teeth."
On a personal note - I was devastated that my baby no longer had his cute, perfect smile. But you know what, after a while you don't even notice it and they are still "perfect" in your eyes. It has now become part of his personality and he's not embarassed by it at all because we talk so freely about it. If anyone asks, we just say what happened. Now he even answers the question himself if anyone asks.