Transport of poly-l-lactic microspheres in sculptra?

Hello! I cannot seem to find information on the deposition or transport (I'm not sure the best terminology) related to the poly-l-lactic microspheres used in sculptra. For instance, what percentage stays where injected vs going into bloodstream? A separate question is, as it biodegrades, what form does it take as it is presumably degraded and then taken into the bloodstream and excreted? Thanks in advance! I'm looking for a talented sculptra injector.