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.
Most children with Invisalign or other dental braces begin active orthodontic treatment between ages 8 and 14. However, the American Association of Orthodontists recommends an orthodontic check-up no later than age 7.ost children with Invisalign or other dental braces begin active orthodontic treatment between ages 8 and 14. However, the American Association of Orthodontists recommends an orthodontic check-up no later than age 7.