Q. Dear Dr Solankie, I am considering having my teeth straightened, however am unsure as to waht is the best method to use. I would like to know the costs of certain treatments and if they can be offered on the NHS? I am 25 years old and so don´t want something that is really obvious, however can´t afford anything like Invisiline which I have heard is very expensive. I like the idea of the brace which fits behind the teeth so you can´t see it. Are their any other options i could look into? I don´t know if it makes any difference to cost but it is only one side of my mouth where my teeth are crooked – the other side is completely straight! It is quite bad though and knocks my confidence alot. Any advice on costs etc you can would be very much appreciated. Thank you.,