Is It Possible to Do a Bone Graft in Order to Close Black Triangle Between the Teeth?

I believe I recall your case from a previous question a few days ago.  As mentioned previously, a gum graft would not close this space completely, but if a surgeon could even close it by 50 percent we could close the rest with veneers.  It would be challenging, but should be able to be accomplished.  I think that the orthodontist has accomplished everything possible, and your only choice would be what I mentioned.  Good luck.

A bone graft won't close the triangle, but veneers would do it.  Probably need to do at least four.

It is possible to take a tissue graft from the maxillary tuberosity that is very dense and grafting it under a coronally repositioned flap.  A bone graft would be my last choice of treatment unless bone pockets were present.

It is also possible to super-erupt 8 and 9 to grow more bone and esthetically reshape the crowns. 

From the picture it looks like you are a candidate to remove mesial tooth and move the teeth closer but a radiograph is needed to evaluate the bone, how extensive is the bone loss.

Another suggestion is to do reverse vestibuloplasty to prevent exposure of the black triange when smiling.  This is usually done to cover a gummy smile.

Bonding is the easiest alternative.