This is a shot in the dark.
My dad passed from dementia. That’s the best diagnosis we got. He wouldn’t go in under an MRI machine.
He had horrible , infected teeth. They were badly infected.
There’s linkage of poor oral hygiene and Alzheimer’s.
https://www.health.harvard.edu/mind-and-mood/good-oral-healt...
If I had know this sooner, I would have pushed harder for him to have those bad teeth extracted and had him start using a water pik.
I worry that what he died of was preventable.