The causes of tartar include poor oral hygiene, related to the frequency of eating and the quality of saliva. Tartar, also known as tartar, is a calcified layer of soft scale deposited at the gum margin of the tooth surface. The main reason for the formation of tartar is poor oral hygiene, not brushing in time after eating, food residues accumulate around the teeth, if not removed by timely brushing, soft tartar is formed over time, and tartar is formed under the calcification of saliva calcium ions. It needs to be removed by timely scaling, otherwise it will form gingivitis or periodontitis and lead to tooth loss. Tartar is also related to the frequency of eating. The formation of tartar is accelerated by the frequency of eating sweet foods or sticky foods, such as sweet cookies, where the residue adheres to the surface of the teeth, and by bacterial fermentation and acid production, which leads to the decomposition of organic matter and the demineralization of inorganic material in the teeth, resulting in a rough surface. The formation of tartar is also related to the quality of saliva. Saliva has an important flushing effect, and if saliva is sticky and the flow rate of saliva is slow, this condition also accelerates the formation of tartar. Therefore, tartar is related to the soft tartar of the teeth, but also to the consumption of sweets and the low flow rate of saliva.