About 120 million people in the US are missing at least 1 tooth, and 36 million people do not have any teeth. If you are one of the 15-20% who wear dentures an issue for denture wearers is gum infection due to Candida Albicans or fungus that grows on the dentures-now this is called bio-film and the surface of a denture provides an ideal area for this.
How do you get rid of this fungus- None of the denture tablets were able to get rid of the bio- film completely. 
The Polident 3 Minute and Corega inhibited the proliferation of fungus using 150ml of water for dentures of any resin type