Metric Space. A metric space is a set with a global distance function (the metric) that, for every two points in, gives the distance between them as a nonnegative real number. A metric space must also satisfy. 1. iff, 2. , 3. The triangle inequality.
PAYING FOR INVISALIGN TREATMENT. Many dental insurance plans cover Invisalign treatment just as they would other orthodontic treatments like metal braces. Plans may cover up to $3,500 of Invisalign treatment. Talk to your Invisalign-trained doctor or insurance provider to find out how much youâre covered for.
There are two ways that might reduce the total cost for Invisalign. 1  Insurance. 2  According to a 2010 Invisalign survey, about twenty-five percent of Invisalign patients received an average reimbursement of $500 from insurance companies. Insurance. 2  According to a 2010 Invisalign survey, about twenty-five percent of Invisalign patients received an average reimbursement of $500 from insurance companies. 3  This is because Invisalign is considered an âorthodontic treatment,â a medical category in which insurance covers procedures.