This is a question that I will answer with yes and no in the sense that both of them have their advantages and disadvantages. Although one of the types of an electric toothbrush is better than the manual toothbrush. An electric toothbrush is a toothbrush that uses electric power supplied usually by a battery to move the brush head rapidly, this movement can be either oscillating side to side or rotation-oscillation, the rotation-oscillation movement is usually through one direction first and latter to the other direction.
Before I will give my answer to this question, I will let us see more of what electric toothbrush is, since we all know what a manual toothbrush is all about.
Classification of electric toothbrushes
Electric brushes can be classified into 2 categories according to how their movement formation. The movements are vibration or rotation-oscillation. When using a vibrating toothbrush, a brushing technique similar to that used with a manual toothbrush is recommended, whereas with rotating-oscillating brushes the recommend cleaning technique is to simply move the brush slowly from tooth to tooth. Electric toothbrush produces 3,000 to 7,500 brush strokes a minute.
New Model with More Efficiency
Presently there is a new development in the type of electric toothbrush which is named Ultrasonic toothbrush or sonic toothbrush which uses ultrasonic waves to clean the teeth. This type of toothbrush will produce 30,000 to 40,000 brush strokes a minute.
In independent research, it was revealed that most electric toothbrushes are no more effective than manual brushes provided that the users of the manual toothbrush will brush effectively. However, the rotation-oscillation model have been found to be better than the manual toothbrush  The research concludes that the way brushing is done, including the amount of time spent, is more important than the choice of brush. For certain patients with limited manual dexterity or where difficulty exists in reaching rear teeth, however, dentists strongly feel that electric toothbrushes can be especially beneficial. It will help reduce the plaque around the teeth which means no or less dental floss.
What we should know here is that it is not the type of action of toothbrush or it correct usage that determines the effectiveness of a toothbrush, but it is determined by the condition of the brush head, which loses its effectiveness over time due to bristle breakdown and wears. Most manufacturers, as well as dental professionals, recommend that heads be changed every three to six months at a minimum, or as soon as the brush head has visibly deteriorated.
I hope you have found the answer you wanted from the whole of the article.