Offices of Bankhead & Firth Orthodontics. Located in St. Louis, Sunset Hills and Eureka, Missouri, we are an orthodontic office specializing in early childhood and adult orthodontics, Clarity braces and Invisalign.071770ATTR:ORTHODONTICS162770ATTR:BRACESCHILDRENDENTISTSDENTISTS - ORTHODONTISTS (STRAIGHTENING - BRACES)FINANCING