Am I a candidate for ultrasound cavitation and radio frequency treatments?

Hi, I really wanted to get 40K Cavitation for myself, to assist in losing my stubborn lower belly fat. The thing is, I have a copper IUD in my uterus (Paragard). I read that with certain implants you are unable to do the treatments... is this true? Also, I wanted to have radio frequency facial for skin tightening on my face. I have had a bone graft dental procedure & I believe that there were two metal screws put into my gums, will it be safe? Aside from that I am perfectly healthy.