I got an orthodontic treatment done when I was 10 for crowding of teeth and my 1st premolars were extracted. now I am 22 and my upper incisors are getting proclined, my upper 3rd molars are fully erupted and lowers are partially erupted. now if I undergo treatment again, will my molars be extracted? As there is hardly any space between my teeth. Is it all right to get 1st molars extracted for orthodontic treatment? will it not cause any other trouble (like tmj problem) ?