If the calculus falls off by itself, it means that there is too much accumulation of calculus and soft tartar in the mouth, so you need to go to the hospital as soon as possible for cleaning and treatment to completely remove the calculus in the mouth. Dental calculus themselves fall out that the accumulation of dental calculus, is the daily oral cleaning is not done well, dental calculus is plaque accumulation of calcification, usually the most serious accumulation of the tongue side of the lower anterior teeth, dental calculus off only partially off, will not be all automatically off, should be cleaned and treated as soon as possible. If the calculus falls off by itself, it means that the oral hygiene environment is poor, and a full mouth examination should be carried out first to check the periodontal condition, the looseness of the teeth and the X-ray auxiliary examination of the alveolar bone with or without resorption. Comprehensive intraoral condition is informed to the patient and the patient is advised to undergo periodontal treatment as soon as possible, postoperative precautions are instructed, and the time of follow-up is informed. Intraoral hygiene was maintained using proper tooth brushing methods.