We once had a long thread going on teeth.  I have a book called "Children: Growth and Puberty" by Ze’ev Hochberg.  He has the age (average I guess) of tooth loss of every tooth.  The lower jaw front incisors are the first to go and he says 6-7 years old.  I will scan the page and send it to you - I think I have your email address.

Me and my children all lost our teeth very early.  My son just turned 11 and  he’s been done for a while except for wisdom teeth.

I think you told me that bone age which is measured in the hand, doesn’t always correspond to growth of the long bones.  Probably teeth are also not always exactly in sync either.