Tear trough Juvederm filler using needle instead of cannula?

I had a consultation to correct my under eye fillers that only lasted two months so back to square one. I went to a different doctor this time and they use juviderm fillers which is great (I think) but they don’t use cannulas which kinda worries me. Not only does it have a higher risk involved I’m also wondering how much bruising can be expected from multiple puncture wounds. I’m I over thinking this or should I find a provider that uses cannulas?