The other response addresses only the volume effect of the filler. Sculptra creates scar tissue "new collagen" below the skin surface which is effective in restoring volume but can make flap elevation slightly different depending on the depth of placement. It should be no problem but other responses fail to mention this effect. Go to an experienced surgeon that specializes in facial surgery.
This is not a problem. In fact, in patients with aging related volume loss I recommend replacing lost volume before performing facelift surgery. It is much easier to create a natural facelift result if volume has been replaced prior to surgery. You should feel confident that your Sculptra treatment will not cause any problems with your facelift. I hope this information is helpful.Stephen Weber MD, FACS