Calculus(tartar) is a mineralized plaque in dentistry..
Calculus (tartar) can smell bad because it traps bacteria on the teeth and around the gums. The bacteria can cause bad breath and can cause the first stage of gum disease, called gingivitis. If this is not treated early, it can develop into periodontitis, which can cause loss of gum tissue and bone around the teeth.
As for tonsil stones, they are common and not harmful. They form when saliva, small food, dead cells, and bacteria get trapped in the small holes of the tonsils and get hard over time. Tonsil stones smells so bad that it can cause bad breath .
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