Sculptra is a little different from a traditional hyaluronic-acid filler because it is a collagen stimulator rather than an immediate volumizing filler. The amount needed for the temples varies considerably depending on how hollow the temples are, your facial anatomy, and how much correction you're looking for. For facial treatments, 1–2 vials per treatment session is a commonly used range, but the temples can require a personalized treatment plan. A recent study specifically evaluating Sculptra for temple volume loss used up to three treatment sessions spaced four weeks apart, rather than assuming that one treatment would provide complete correction. So if you previously had Sculptra in your temples and can't remember whether you received one or two vials, I wouldn't use that number alone to determine what you need now. The amount of residual collagen stimulation and your current degree of volume loss are more important. I would also avoid thinking of Sculptra as something that simply "fills" the temples immediately. The result develops gradually as your body produces new collagen, so it's usually better to start conservatively and reassess rather than over-treat the area in a single session. If your temples are only mildly hollow, one vial may provide a subtle improvement; more noticeable volume loss may require additional treatment sessions. The goal should be restoring a natural transition between the forehead, temples, and cheeks rather than completely eliminating every contour. Because the temple is an anatomically sensitive area with important blood vessels, Sculptra should be injected by an experienced medical injector using an appropriate technique.