Does it matter whether you use a needle or cannula to fill in acne scars with dermal filler on the cheeks?

Normally it is better to use cannulas  when injecting anywhere on the face, but in the case of filling out acne scars needles must be used. 

Hi,Acne scars are the result of irregularities in the skin surface. In order to improve their appearance, fillers must be injected into the skin. This can only be accomplished with a needle - blunt tip cannulas will not work. Best,