1 If X is a topological (or metric) space and M is a metric space, then the set of all bounded continuous functions from X to M forms a metric space if we define the metric as above: d (f, g) = sup x in X d (f (x), g (x)) for any bounded continuous functions f and g.
Invisalign is orthodontic appliance, so since orthodontic treatment is allowed as an FSA expense, Invisalign is covered. Different companies have different rules concerning amounts set aside and the timing of how funds are used for orthodontics.
Orthodontist assistants are specialized dental aides who work with patients receiving or wearing dental gear. They might take x-rays and photos of mouths, adjust braces and make teeth impressions. Becoming an orthodontist assistant generally requires completion of a dental assisting certificate or degree program. Additionally, orthodontist assistants might need to be licensed, depending on the requirements of their state.