Over the last ten years, the use of cosmetic fillers has become increasingly popular. Historically, delivery of cosmetic tissue fillers has been through a sharp hypodermic needle. However, new blunt-tipped needles, called microcannulas, are gaining popularity with aesthetic injectors. The decision to use needle vs. cannula is the choice of the injector, but the advantages of using a blunt-tipped cannula make them the preferred option for some.