Sometimes orthodontists are heavy handed when it comes to perfecting a patients smile. They want every molar to be in perfect alignment when all the patient really wants is to have straight teeth. 18 months seems really long for treatment so if I were you I would try to get a third opinion regarding Invisalign and see what they think. Go to the Invisalign website and look for another referral. After the new year the web site will list Dr's in order of their expertise so that will help you a lot.





