Dear patient, Venus Viva has 2 platforms: the diamond hand-piece is non ablative radiofrequency. The more aggressive hand-piece with the ablative needles. Results are great because the energy source (ablative radiofrequency) travels down the needles into the skin to a depth of 2-4 mm. Treating over fillers is OK except if the filler was placed very very superficially such as Restylane Silk. I do not hesitate to treat the skin over areas that have had Juvederm or Voluma or Perlane for example but try to wait at least a month after treating the skin with very superficial fillers such as Restylane Silk and Bellotero. I hope this was helpful. Yours, Dr R.