When I smile you can't see my teeth. How would I fix that? Dentist or plastic surgeon? (photos)

There are multiple approaches that can be used to give you a smile that naturally and effortlessly shows teeth.1.  Veneers that add extra volume labially to your mouth2.  Probably best DNA Appliance to grow your upper jaw larger.  Epigenetic Orthodontics3.  orthognathic surgery  (not a primary solution)4 Orthodontics5 combination therapyI would suggest you have your dentist do a mock up that you could wear for a few weeks to simulate the new look.  this may be upper or require upper and lower and possibly bite opening to achieve ideal results.A little time and money in trial work can avoid an outcome you hate.  The anterior and posterior teeth and jaw bones are a frame to hold up soft tissues and you simulate those changes.Ira L Shapira DDS, D,ABDSM,D,AAPM, FICCMOThinkBetterLife.com

An Orthognathic surgeon!the jaw has to be repositioned inferiorly and grafted surgically. This will give you a youthful smile. 

This is an interesting question.  It is possible that you need to practice showing your teeth when you smile by allowing your lips to part.  Try it in front of a mirror and see if you can find another way to smile that allows your lips to part.  I think you might surprise yourself.  Good luck!