How long does it take for Sculptra results to vanish?

Hello! I have had sculptra injections two years ago and it resulted in a big amount of collagen that has changed my body figure from buts to knees. Sculptra particles may be absorbed after two years, but what about the extra collagen fibroblasts have produced? Sculptra providers claim that Sculptra results last up to two or three years. The half-life or type I collagen is 14,8 years, if I’m right. Does that mean that it takes 15 years for the sculptra derived collagen to vanish? Thank you.