Is bonding ok for my bottom teeth to close black triangle? (Photo)

The most conservative, durable, and natural looking method to close black triangles is Bioclear.  This requires a dentist trained in the process but is worth finding one.

I feel it is because of bone loss, bonding is not advisable, because it will worsen the scenario/ cosmetic look., also i can see there is no spacing between adjacent teeth. So can not be improved by braces treatment. But its my advice to do regular scaling/ cleaning to improve gum condition.