Sculptra is an injectable filler that restores facial fat lost by the effects of lipoatrophy, including sunken cheeks, hollow eyes and other indentations. This filler is injected below the surface of the skin in the areas of fat loss. The Sculptra injection consists of an alpha hydroxyl acid called poly-L-lactic acid, or PLLA. This product is safe, synthetic, biocompatible, biodegradable and long-lasting. No pre-testing is required for Sculptra treatments.