Teeth are held in place by the surrounding gums, bone, and other tissues Dental plaque, a sticky coating of bacteria that forms on teeth and at the gum line, is the main threat to teeth and their supporting tissues. If this plaque isn't kept under control it can build up, causing periodontal disease
Teeth are supported by the jawbone. Soft tissues(gums) cover the bone and part of each tooth, and fill spaces between teeth. Ligaments(connective fibers) attach teeth to bone. All of these tissues keep teeth in place to do their job-enabling you to chew and speak.
Dental plaque forms constantly, collecting in the grooves of the teeth, between teeth, at the gum line, below it .if not removed with brushing and flossing, plaque hardens into tartar (also called calculus). Tartar can be removed only with a professional cleaning.