Have a slight underbite from elastics. ortho says remove a bottom tooth (best option) or file teeth down 2 achieve slight overbite. any more options?

Functional Orthodont: Functional orthodontics utilizes various appliances and conventional braces to correct a slight underbite. Ask your Orthodontist/Dentist for more information.

Many: Ranging from elastic traction, premolars extractions, surgery if cause is jaw size discrepancy, etc. assuming you are being treated by an Orthodontic Specialist as opposed to a general Dentist who dabbles in tooth movement, the Orthodontist will have considered all possible solutions and presented you with the best options.