It would have been nice, on a site such as this to have introduced yourself, especially as you are asking for help.
First you need to examine the word 'dementia'. What exactly does this word mean?
A medical professional described it to me as 'a word used to describe the symptoms which occur when the brain is affected'.
Pick up on the word 'symptoms' here (find out what the symptoms of the various dementias are) How do these symptoms present themselves medically? (In other words how would a local GP first be presented and what would be presented - behavour which is affecting every day living of course)
On the social side - how do the symptoms affect society/carers? The costs to carers? The costs to society ie., the National Health System, the local authorities etc.,
On the treatment side which includes both the social and medical - what is the usual pathway to treatment in view of the fact that at present there is no cure?
All of these you must research for yourself.
Good luck but don't expect people here on talking point to give you answers. They are at the pointed, sharp end of the 'model' you are wishing to describe and are suffering both emotionally, physically, and financially!
xxTinaT