How do I find help for dental issues?

My 99-yr old aunt with mod/adv dementia has a similar issue. It was decided to not put the bridge back in (and the dentist filed down several of her teeth). She still has enough other teeth to eat solid food. It doesn't look great but it saves a lot of extra daily care. There is such a thing as mobile dentists but in my experience they only go to facilities. You will probably need to take your mom in so call around and ask if they have experience with dementia patients. If your mom is in a wheelchair, or can't physically climb into a dental chair, or is on Medicaid, you'd need to find a dentist who can accommodate any of these extra challenges. Otherwise you can see if there's a tutorial on YouTube. Wishing you success in figuring out what works in your situation!