CONTAMINANTES
Manual vs. power toothbrushes: One kind of brush more effective than all others
Rotational oscillation toothbrushes -- those that rotate in one direction and then the other -- removed up to 11 percent more plaque and reduced bleeding of the gums by up to 17 percent more than manual or other power toothbrushes, according results compiled by the Manchester, England-based Cochrane Oral Health Group that analyzed data from clinical trials conducted over 37 years.