I had my annie clipped six years ago and do not take antibiotics b4 a dentist appointment. I did, however, have a problem with my jaw following surgery and needed an MRI. If I hadn't taken my surgery records with me they would not have done the MRI. I contacted my surgeon and had them send a business card with the date of surgery and types of clips used and I show that whenever a question arises. I also have a card from Central Iowa Blood Bank specifying that my own tissue was used for the graft instead of a cadavar so now I can donate blood. So strange things do pop up when you have something major done. Katie