Although buttocks implants have been on the market for over 25 years, I am not aware of any study that addressed the issue of replacement rates. For some reason, buttock implants have never caught on, even though techniques had been perfected way before fat grafting to the buttocks was refined. Most surgeons who focus on buttocks reshaping are choosing fat grafting by a large margin. I do many butt lifts a year, and I haven't done a butt implant in over 2 years. It's just that when I sit down to explain the pros and cons, the cons for the butt implants far outnumber the cons for fat transfer. Briefly put, the butt implant is a mechanical device, and as such it has a failure rate, much like breast implants. Fat, on the other hand, is yours, and the fat that takes is there for life. Read more below: