For people with dexterity problems, they are easier to use. American Dental Association (ADA) People with physical condition say ( Such as arthritis, limited hand or arm movement or manual dexterity problems) This makes it difficult to use a manual toothbrush and consideration should be given to using an electric toothbrush. Why? The handle of the electric toothbrush is relatively large, and it is easier to hold. In addition, their electric brushes do cleaning for you, especially in tricky areas that require fine motor skills, such as the back and back of the molars teeth and the back of the upper and lower front teeth [source: ADA].