Orthodontist said that if daughter did not get braces that she would be more susceptible to possible jaw problems in the future. Does this constitute as medically necessary? She didn't have any jaw/dental problems before my ex decided braces would "help her self esteem". It was even explained to me when i talked to dental assistant that she was part of group A because her teeth were not perfect so there was always room for improvement. Group B would be for people with very bad teeth. Now she wants me to pay her back half! Our child support order does state all of these decisions need to be made jointly and that I am responsible for x% of "Medically Necessary Orthodontia". How can I prove they weren't necessary?