Best option to widen smile? (Photo)

Your dental arches are narrow. Widening the arches is best achieved when you are very young (less than 11-12). At this point you can get some expansion of the arches with regular orthodontics (but not nearly as much as you would have gotten as a child) and with veneers. My opinion is you probably won't be able to get rid of the buccal corridors completely. Good luck, sometimes every bit helps.

Your best option is to find a good cosmetic dentist who can do veneers to build those teeth out. You can test drive it with some bonding, but long term, other than more ortho and surgery, the easiest way will be with veneers.

Great question. The term for these dark areas between your back teeth and lips when you smile are termed deficient buccal corridors.Your options are to pursue more orthodontics and consider surgically widening the palate, or adding porcelain or composite to the sides of your teeth. An experienced cosmetic dentist can show you what this looks like directly in your mouth with try in composite or digitally altered photos.Good luck

Based on the photos, your arches are narrow and as a result show as dark spaces in the back when you smile. You can have orthodontic treatment to expand the arches or build up the teeth in the back with veneers. This will improve the symmetry and harmony of your teeth when you smile.