Hi,

A clear aligner practitioner told me that to start the treatment I would have to get my upper wisdom teeth extracted. My lower wisdom teeth were removed years ago and now the top ones are hanging a bit.

I don't see why they would need to be removed as I would think the aligner could be made in such a way to fit, but would it be bad to have them removed? I don't think there is any function to them anymore, as there are no lower wisdom teeth to press against, but might it perhaps be visible if I extracted them (sunken cheeks)? 

Also, I have this theory of all teeth being able to move backwards over the years when you remove the back teeth, leading to a recessed face. Anyone experienced this? What do you think? I am not sure if this happened with my lower dental arch.