Dental cleanings include elimination of plaque and tartar (calculus) deposits that have grown up on the teeth over a period of time. Your teeth are continuously dripping in saliva which contains calcium and other substances which help strengthen and protect the teeth. This chalky substance will sooner build up over time, like limescale in a pipe or kettle. Usually, it is tooth colored and can hand be mistaken as part of the teeth, but it moreover can vary from brown to woebegone in color. If the scale, or calculus is not liable to yaffle on the teeth it will, unfortunately, provide the right conditions for bacteria and virus to thrive next to the gums. The sole reason of the cleaning and polishing is basically to leave the surfaces of the teeth clean and smooth so that bacteria are unable to stick to them and you have the largest endangerment of keeping the teeth wipe during your regular home care. Also, it leaves your teeth feeling lovely and smooth and clean, which is nice when you run your tongue virtually on them.