Stony Brook, NY Orthodontist. Dr. Nadav Segal provides Orthodontics, Dental Braces, Invisalign, Orthodontic Retainers, Adult Orthodontics, Clear Braces, and Retainers to the following locations: Suffolk County, NY, Three Village, Smithtown, NY, Setauket, NY, St. James, NY, Mt. Sinai, NY, Miller Place, NY, Hautpauge, NY, Ronkonkoma, NY, Port Jefferson Station, NY.