The Indian Orthodontic Society is a strong professional society with 6000+ members which is the first Speciality Society of Dentistry in India. The IOS started as a Study Group in Mumbai, in 1963 and was formally established as the Indian Orthodontic Society on Friday the 5th October 1965. The late Dr.H.D. Merchant was the founder President and Dr. Naishadh Parikh the founder Secretary and Treasurer.