Can dental bonding fix black triangles from braces? (photos)

The likely reason behind the black triangles you are seeing is because your teeth are a bit more out of the bone than they should be - and as a result, a bit more out from the gums too. This is evident in the recession from your lower anterior teeth, where you can see recession of the gums and some of the roots of the teeth showing. Continuing your orthodontic treatment to intrude the teeth further into the bone/gums will ensure those areas are covered by gum tissue once again. The greater percentage of a tooth's root structure that is fully in bone will also mean better anchorage and less likely to fall victim to periodontal disease/loosen over time.Alternatively, if you want to take a shortcut route, a dentist can add composite resin material, aka bonding, to the teeth to close those black triangles, or close them with veneers. This route, however, will not solve the underlying structural concern of the teeth not sitting fully in the bone. You can ask your orthodontist about placing TADs (temporary anchorage devices) to help facilitate that movement more efficiently.Hope that answers your question!*All advice/any statement made here should not be taken as definitive dental advice. The ideal way to obtain definitive information is with proper diagnostic procedures during an in-person consultation.