When dental calculus is rotten, it usually refers to the gingivitis of dental calculus combined with infection, which can be treated by surgery under the guidance of doctors. 1. Dental calculus is usually caused by plaque, tartar deposits and other factors that are calcifying or have been calcified plaque deposits on the surface of the teeth, when the surface of dental calculus covered with a large amount of plaque, generally by brushing can not be removed. 2. If left untreated, it may cause calculus to gather locally and cause irritation to the surrounding tissues, resulting in symptoms such as more serious calculus enlargement and bad taste in the mouth. It is necessary to take subgingival scraping, supragingival scaling and other surgical methods under the guidance of the doctor for treatment, and local placement of iodized glycerin to promote the recovery of gingivitis. Gingivitis patients should pay attention to keep the oral cavity clean in daily life, the daily diet should be light, avoid eating sugary or sticky food, every six months to a year should be a dental cleaning.