Teeth do grow stones, medically known as calculus. Calculus is a mineralized stone-like substance that forms in the mouth when calcium salts are deposited and combine with bacteria. Initially, it can be found as a yellow or dark brown substance in the gum sulcus, and as it develops it can lead to a range of dental and periodontal problems. The causes of dental calculus are many, mainly affected by dietary habits, hygiene habits and disease factors. 1, dietary habits: the formation of dental calculus is mostly due to food residues left in the teeth gap, mixed with saliva, bacteria gathered, the formation of plaque and soft scale, and gradually mineralized, thus forming dental calculus. Some people who like sticky and protein-rich food are more likely to leave residues on the tooth surface, in the adjacent surface close to the gingival sulcus or in the crevices, which makes them more prone to dental calculus. In addition, some partial chewing patients, long-term waste chewing habit patients, due to the long-term use of one side or local teeth chewing, it is easy to cause a large amount of plaque and food accumulation and thus lead to a large number of plaque and accumulation; 2, hygiene habits: failure to clean the oral cavity in a timely manner after eating is likely to lead to food residues on the surface of the teeth and gums grooves, for the generation of dental calculus to create favorable conditions. There are some people, and can not do an effective cleaning of the teeth, so that food debris, and even soft tartar and plaque persists, is also prone to the formation of dental calculus; 3, disease factors: when the oral cavity or teeth, periodontal problems, will also induce the occurrence of dental calculus. Such as gum recession, teeth, and other problems, due to increased gaps, it is easy to lead to plaque and soft tartar generation, resulting in dental calculus. In addition, when inflammation occurs in the mouth, saliva alkalinity increases and the amount of secretion will increase, which can further promote the generation of dental calculus. Therefore, a good cleaning routine is essential to prevent and minimize the formation of dental calculus. Timely cleaning of teeth and mouth after eating, brushing the teeth in a correct way, with soft bristles toothbrush, and teeth at an angle of 45 ° for vibratory brushing, can effectively clean the surface of the teeth and gingival sulcus, try to avoid food residues, and the plaque has been formed and the removal of soft tartar. If the calculus has been formed, it should be actively treated, you can go to the hospital in time for ultrasonic scaling and scraping and other periodontal sequential treatment, to avoid the long term gum edema, gingival margin erosion, bleeding gums and other problems.