Thank you for the excellent question. The desire for buttock aesthetics has traditionally been met with a variety of surgical techniques including surgical buttock lifting, alloplastic / silicone implants and autologous fat grafting. Implant augmentations are still commonly performed, however a systematic review reported a complications rate of 21.6%, including capsular contracture, capsular migration, wound healing complications and implant related infections. Autologous fat grafting combined with tumescent liposuction to obtain donor fat is a highly popular approach to buttock augmentation. However, it is not suitable for thin patients without sufficient donor areas or for patients demanding a non-surgical technique with minimal downtime. For these reasons there has been a recent increased interest into newer, safer, less invasive approaches for gluteal enhancement. Biodegradeable fillers such as Sculptra aka poly-L-lactic acid (PLLA) meets this demand. This products provides safe, effective and long lasting results in patients who are not surgical candidates or who do not want the downtime or risk associated with a surgical gluteal augmentation. At our center, we regularly perform Sculptra buttock augmentation to improve buttock curve, contour and projection. This is not a high risk area in our hands. The risk of lumps forming is low, and these can usually be massaged out without issue. We have never encountered necrosis and have treated hundreds of patients with our safe and highly effective technique. There is a video attached which you may find informative. I would advise you see a board certified cosmetic surgeon who performs a high caseload of Sculptra buttock augmentations. I wish you well.