Adult Clinical Trials as Topic Dental Plaque Index Dentifrices--therapeutic use Double-Blind Method Female Fluorides--therapeutic use Gingival Crevicular Fluid Gingivitis--drug therapy Glucan 1,4-alpha-Glucosidase--therapeutic use Glucose Oxidase--therapeutic use Glucosidases--therapeutic use Humans Male Middle Aged Periodontal Index Toothpastes--therapeutic use