If you can't get back to your old orthodontist easily I suggest asking them for a referral. You may also look up orhtodontists on the American Academy of Orthodontists to see if there is one close to you. They should be able to make the recommended treatment decisions.
While it is COMMON, you don't have to accept black triangles as a final result. Often, the best solution is Bioclear. This is a method to fill in these spaces with a natural looking result, usually in a single visit.
It is not clear from your description if you are looking for a facial change, bite correction or smile improvement.I would seek another opinion and make sure that it is an orthodontic specialist. Preferably one with some experience, (10+ years in practice is a good number). If the person who y...