I still have some baby canine teeth on the top (I'm 35). Dentists are always quite surprised that they're still there, though they are starting to need attention. But that's quite unusual. I realise that doesn't answer your question, though - sorry.
They all go - or should anyway! DS (14) still has one premolar baby tooth, which for some reason has just not shifted. But that is unusual, so I'd guess your DS will be losing them over the next 2 or 3 years.
I was wondering the time-scale of teeth dropping out too. My ds1 is 10 and has only lost 8 teeth in total - 4 top, 4 bottom at the front. He still has his canines and molars - although he has grown extra molars at the back. He hasn't lost any teeth for years. I don't remember losing any teeth after primary school (except my wisdom teeth but they were extracted!) but I could be wrong. My mum reckons that she had to have some milk teeth removed because they weren't falling out, so that the second teeth could come through. Oh well, we're off to the dentist soon so I suppose I could ask him!
they start with 20 baby teeth and end up with 28 adult teeth (before wisdom teeth which they may of may not get) It means the teeth that your ds 2 is getting now are his adult teeth. They won't come out. dd has grown her back adult molars before she'd lost any of her milk teeth.
KM,my DS has recently got two top and two bottom "adult" molars (his first molars I assume) and he has just turned 6 but still has his "baby" molars as well; the new ones have filled up the gap at the back of his gums. Of his baby teeth, only one of the bottom incisors has fallen out so far and new one not in yet.
I need to get him to the dentist though, just to make sure all is well especially if he isn't meant to get them until around 9 or 10.
The ones at the back would be the "third" molars, counting from the front backwards. That table didn't say anything about those, but I'm sure I remember DS getting his before he lost the baby molars, so I think it's normal. But do check with the dentist when you're in for a checkup, or wait for ComeOVeneer to see this thread, as she's the expert!