Relative to the manual toothbrush group , after four weeks of use the Colgate ProClinical C@ toothbrush , with either the triple clean head or sensitive head , provided statistically significantly greater reductions in whole mouth plaque index scores ( @ % , and @ % , respectively ) , in gingival margin plaque index scores ( @ % and @ % , respectively ) , and interproximal plaque index scores ( @ % and @ % , respectively ) .