METHODS	Study 1 compared a commercial chewing gum ( Colgate Dental Gum , CDG ) with a water control after 24 hours post-brushing ; Studies 2 and 3 compared CDG to two different brands of commercially available fluoride dentifrices after 24 hours post-brushing ; Study 4 examined the anti-plaque effect of CDG plus a regular fluoride dentifrice ( Colgate Winterfresh Gel , CWG ) versus brushing with CWG alone for five days .\