This clinical study will be carried out in healthy adult volunteers with moderate gingivitis. Treatment effect will be determined by evaluating the efficacy, in a Chinese population, of a dentifrice containing 0.454% w/w stannous fluoride to control gingivitis and supra-gingival plaque following 6 and 12 weeks twice daily brushing, compared to a fluoride control dentifrice. During the 12 week treatment period, participant will brush with their allocated study product twice daily.