What Are the Risks of Mixing a Temporary Filler with Artefill?

There are no problems using Artefill in areas where other fillers have been injected and visa versa. In fact, I often will layer a thinner filler such as Juvederm Ultra over Artefill or Radiesse to treat finer lines that overlie deeper lines and wrinkles.

I presume you are not trying to mix them in the same syringe, but just inject a temporary filler after Artefill? If so there is not any risk above and beyond the risk of adding a filler without Artefill. Artefill in fact has a temporary filler mixed in with it, bovine collagen. As long as you utilize an experienced injector it should be safe.

I have layered Artefill in the same area as Juvederm and Perlane (as these products were fading) and have seen no problems at all. I would not place Artefil too soon after HA fillers, but after several weeks, when the HA filler is set/smooth, it should pose no problems.