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.
Two orthodontists recommended braces for less than a year. *Another orthodontist recommended invisalign for about the same time. This one said that invisalign would probably be better for me because it can move one side of my teeth outward more than the other, whereas, braces canât.