What are the advatages of injecting fillers with a blunt tip cannula vs. a needle? I am asking specifically about Restylane, Juvederm, Radiesse and Perlane for the purposes of cheek enhancement. I know the skill of the injector is important but how does the tool assist the injector in improving results? Does it help more in some areas such as cheeks, under the eyes, chin, nasolabial folds, etc. Would love to hear your input. Thank you.