I worked in long term care for a number of years and I remember the difficulty finding dentists willing to work with people who had dementia. It is sad, but understandable. They are difficult to work with when following instructions and describing their symptoms is so integral to the work being done.
Here is a link about
dental care for people with Alzheimers:
http://alzheimers.org.uk/site/scripts/documents_info.php?documentid=138
If the above link isn't working for you, try this one: http://tinyurl.com/7jpkq5w
It may help you. If you're not in the UK, ignore the part about finding an NHA dentist, but you can contact your local Alzheimer's association for a list of dentists more likely to work with your mom. You may even find the information online, but if not, telephone them as they are extremely helpful.
(eta: Not sure why the first link isn't working. Some of the time it does and some of the time it doesn't. If you get the page not found response at the Alzheimer's Society page, use the 'search our site' box and type in or copy & paste: Dental care and dementia & it will take you to a page listing the article, then click on that article and it brings you to the link I posted above. Or just use the tinyurl link instead - it's the same result.)
Post Edited (baby dumpling) : 5/2/2012 11:18:42 AM (GMT-6)