Re: the relationship between caries and plaque
The worst foods for tooth decay are sticky and crunchy as they adhere to the tooth surface, especially areas which are difficult to clean such as the fissures in molars.. Dried fruit is probably not the worst as the sugar is unrefined. So far as calculus is concerned that which is found above the gum is not too serious but below the gumline it causes gum disease by trapping the plaque and destroying the fibres that connect the tooth to the bone. This is periodontal disease, which is difficult to treat but simple to prevent.