Q. I am 40 years old and have been unhappy with my teeth as long as I can remember, I try having a conversation while covering my mouth with my hand as I am so consicious of my crooked teeth. I would be interested in invisalign braces but I have afew crowns at the back and wondered would this allow for these braces. I would also like an estimate of how much it costs. Although both my top and bottom teeth are crowded, I am more consicious of my top as my two front teeth overlap slightly. Thank you.