Case duration of an Orthodontic treatment may vary case to case. Best person to contact for your situation is Dr Jignesh Kothari, Santacruz. He is the best for Lingual braces in the country.

The time duration for lingual orthodontics may vary from 2 years to 4 years even depending upon the case..Get the braces examined from a certified dentist specialised in the branch or share the images for a better suggestion..

There are certain certifications and courses to practice lingual braces, which determines the knowledge and expertise of the doctor.  Generally, it is slower compared to labial braces, and the same principle and methodology used for labial cannot be applied to lingual. It also depends on what stage you're on and what needs to be done. If photographs and xrays are sent, an opinion can be provided.

Please share your x ray and treatment photos,  so that I can guide you much better. Orthodontic therapy treatment will vary from one year to two years. 

Hi.. The total treatment time varies from case to case. In more complicated cases the time period can be anywhere between 2-4 years. If you can share details or pictures of the pre treatment stage I might be able to help you better