Power tooth brushing?

The answer is B. Electric toothbrushes with rotation-oscillation movements were the only ones found to be more effective than manual brushes. (These brushes rapidly rotate first in one direction, then the other.)

The study was based on 29 clinical trials for electric toothbrushes conducted on 2,500 people involving different actions of the heads of the brushes. None of the heads -- from the pulsating head, to the ultrasonic vibrating head, to those that worked at the speed of 35 cycles per second -- were found to be more effective than manual brushes. Only the rotating-oscillating head was found to remove about 7% more plaque and led to 17% less gum disease than manual brushes.

Some other studies have found more advantages of electric toothbrushes. People who use electric brushes tend to spend at least 2 minutes brushing while manual brushers tend to rush. Two to five minutes of brushing time is recommended. Also, electric brushes use a consistent level of movement that reduces excessive tooth wear and gum irritation due to manual over-brushing. However, as with manual brushes, changing the head every 3 months and using a soft-bristled head is important to avoid excessive wear of the outer enamel.

So what did researchers find is the best way to prevent tooth and gum disease? Fluoride toothpaste. Children ages five to 16 had 24 percent less cavities over a three-year period.

Resources:

Read about the recent British study at the BBC news Web site.

Based on other reports, some experts still recommend an electric brush.

Another argument for the electric brush from Floss.com.