How likely is it for intramuscular 485cc oval buttock implants to shift?

Is the risk of shifting always going to be there or is there a point in time where I can stop worrying completely? I had buttock implants 7 weeks ago and I'm scared about them shifting as they are oval shape. I've read the stories of oval implants shifting giving the buttocks an odd and uneven look. Does excercise help to keep the implants in place by building up muscle around the implant? Or does excercise make it more likely for them to shift out of place?

No doctor answers yet