Sculptra or PLLA, is a biocompatible and biodegradable synthetic injectable that works with your body to stimulate new collagen production. It works deep within the dermis to restore collagen to the supportive structures of the face. Over time, the PLLA is naturally eliminated from the body while the results (new collagen formation) remain. Because it is a biostimulator and not an actual dermal filler, the results are gradual in onset and results last up to two years.