Advanced dental clinic in South Bopal, Ahmedabad Dr. Naisargi Mehta Siddhpura BDS, MDS (Orthodontics) Orthodontics specializes in the field of crooked and misaligned teeth. Treatment starts from the age of 6-7 when the permanent teeth start to erupt, to full grown adults ranging till the age of 40-42. Dr. Manthan Siddhpura MDS (Maxillofacial Surgery), FHNO (Surgical Oncology) This field specializes in the area from the base of the skull to the neck including the jaws and TMJ. Also, after his masters he has done his super specialization in treating cancers of the mouth, head and neck.