Has anyone had any luck in helping a person with significant dementia obtain hearing aids?

Try not to pay too much for them. Since your mom has significant dementia the hearing aids will most likely get lost or misplaced.

My dad was deaf in one ear and hard of hearing in the other and he always had a hearing aid. Once his mind started to go that hearing aid got lost all the time. I can't tell you how many times I tossed his room looking for the thing.

My mother can hardly hear at all. There is no dementia, but i have been told that hearing aids are hard to use and that the batteries in most are a problem.

A physician told me that the ones from an outdoor store, for hunting, are as good as any.

You need to know if her state offers hearing aid assistance. Or try the Walkers Ultra Ear for about $25 per pair. Some folks just don't like hearing aids. My husband refuses to wear one. And you have to keep the ear very clean or it won't work. Make sure she doesn't have a wax buildup, because it could be as simple as a wax plug blocking the sound. See an ENT doctor if they need cleaning.