Hi there and welcome to the site. Your question will have a better chance of being answered in the general discussion forum.
as for dental implants and MRI-- make absolutely certain your MRI technicians are aware of this before you go in, as well as your oral surgeon/dentist. Also, take a look at this:
hope this helps and welcome again,
Disclaimer: Any information you find on this site should not be considered medical advice. All decisions should be made with the consent of your doctor, otherwise you are at your own risk.