Financial need, hygienic and welfare needs in older people is increasing due to growth of aged people population. The derangements in aged for person’s musty aims of signs producing of illness and its physiopathology are different from those younger persons. Therefore with needs more of attentions. Dementia after arthritis causes weakness in older people. Dementia is a syndrome that it creates derangements recognition without derangement in cautiousness. It leads to memory’s weakness, difficulty in calculation, abstraction, derangement in mood, affect and derangement in judgment, abstract thinking, decreasing of verbal skills and derangements in direction. From types of dementia is pointed to: Alzheimer, dementia resulting of Pick’s disease, Creutzfeld – Jacob, Hangtington, hydrocephalic with natural pressure and Parkinson. Treatment of dementia is included curing of basis illnesses such as high blood pressure, and using medicine such as: anticholinestrase drugs and / or designed rehabilitation plans. Acompanishing Patient’s pivoted care principles in rehabilitation with derangement and concentration on it, is basis of arranging of services and presentation of nursing cares.