Can dermal fillers help with angular cheilitis? (photo)

I’ve been told by many doctors that this is angular cheilitis. Treatments have included fungal creams, bacterial cream, and various pills. Creams I can remember right now are desonide and nystatin. I’ve been told by all of them to use lip balm and take vitamin b daily. Those never work. The creams and pills temporarily get rid of it for usually a month or so. Lip balm and vitamin b do nothing. This has been going on for years with varying degrees of severity. Will getting fillers help? Thanks!