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.
Even if you do there will be a waiting period of 12 to 24 months before you could get orthodontics covered. Also, most dental plans will only pay out $750 to $1500 per year so you'd still be paying a lot for the braces. You do have other options, though. 1. Visit a local dental school.eport Abuse. Try http://www.insurancetoad.com to find cheap dental insurance. Also, sometimes if you choose a good PPO plan, it can cover adult orthodontics about 20%. You'll have to choose an orthodontist in the network though.