How many syringes of Bellafill does it typically take to fill under the eyes to resolve hollow look in the tear trough area?

The number of syringes needed in an area is patient dependent.  I would estimate that you would need 1-3 syringes, but it is hard to say without being able to evaluate the area.  As with any filler it is very important that you choose a skilled injector.  BellaFill is more technically advanced than an HA filler (Restylane) and you will want someone who is experienced and skilled, not only with the filler, but with the area of injection.  

We typically do not recommend Bellafill for use under the eyes, due to the sensitive nature of this area and the long-term results of Bellafill. A better option could be a hyaluronic acid gel filler such as Restylane, which has temporary results and can be fairly easily removed if the patient does not like how it looks. I recommend visiting a board-certified dermatologist with experience in treating under eye hollows for an in-person consultation and custom treatment plan. 

I really do not suggest Bellafill/Artefill under the eyes in the tear trough area. This is a permanent filler and if you do not like it  we can not remove it. I suggest using Juvederm or Restylane in this area. This is a more difficult area to treat and it is far better to treat with a filler that is not permanent and that can also be removed.if you want to be treated in this area you want to see a Cosmetic  Dermatologist, Plastic Surgeon or Cosmetic Ophthalmologist with a lot of experience treating this area.