DR Love,
Two things....
1. There is nothing called the "coil system" and moreover, there are more than one type of coil...
2. As a Doctor, did you never learn any spelling? "inserted" and "internally" would have added credibility to your post.
Here is a tip, write your posts in a word processing programme and then spell check them... Might make us actually pay attention. Although, you should probably change your identity too as this one is totally shot....
BLD