You will run into problems if you have Sculptra injected into your lips. The best option for lip augmentation is with a hyaluronic acid such as Juvederm, Restylane or Belotero. They can give you a very natural look, though they are temporary.
Sculptra is not appropriate for the lips. The best places to use Sculptra is in the cheeks and the temples. Hyaluronic acid fillers like Juvederm and Restylane can give a nice, natural enhancement to the lips when injected skillfully. Also, if the hyaluronic acid filler is no longer wanted in the area, hyaluronidase can be used to remove the product.