Insurance will not cover cosmetic dentistry. Anything cosmetic is not considered to be life threatening or necessary for survival. It is considered to be trivial thus not being covered.
Cosmetic dentistry is not a cost effective way to fix teeth. It can cost upwards of a 100 thousand dollars. The average cost is from 10-20 thousand dollars.
Cosmetic dentistry is a specialized branch of dentistry that specifically deals with the "look" of a person's teeth. Whether you have teeth that need a lot of work done or a person who just doesn't...
The answer to your question can be easily looked up anywhere on the internet. It can also be found at your local library or looked up in an encyclopedia?