Sorry to hear about the position you’re in. The links below may help with your enquiry but it also depends on what stages of the disease they’re at and their own willingness and belief system is also a factor. All the best to you and your family.
http://www.tangledneuron.info/the_ta...-dementia.html
http://www.helpguide.org/elder/alzhe..._treatment.htm
Rife technology may also be helpful.
http://www.energy-medicine.info/rife...FR0-lAodwhPlkA