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.
Required Education. College undergraduates who are interested in a career in orthodontia will most likely benefit from coursework or a major in science. Dental schools are selective, and admission requirements include an acceptable score on the Dental Admission Test (DAT); high grade point averages and recommendations may also be required.