Braces that are fixed to the inside of the mouth (Lingual appliances) needs special brackets, skills and treatment methods, so cost-wise they are more expensive. The other type of 'invisible braces' on the market today which is made of clear plastic (Invisalign®) uses the most advanced technology and is individually made to order in the United States. Therefore, the cost of invisible braces is comparatively higher compared to conventional fixed appliances.