The loss of calculus indicates that there is more calculus, and only a small portion of the calculus is lost, but other calculus still exists, the harm is that it may form a sharp edge, which can cause irritation to the tongue or the oral mucosa, and the undislodged calculus is not removed in a timely manner will form an irritation to the periodontium leading to periodontal disease. Calculus is the product of mineralization of the soft tartar on the surface of the teeth, which can form an irritation to the periodontal tissues and lead to periodontal disease. If too much calculus builds up, there is a risk of partial loss. When calculus is first removed, the surface of the tooth is rough and there may be sharp edges, licking will have a friction or tingling sensation, and frequent licking will lead to inflammation of the tongue, and in severe cases, papilloma of the tongue may occur. However, calculus is the main cause of periodontal irritation. If calculus is not removed, the gums will recede, become inflamed, bleeding gums, redness, swelling and pus, and the alveolar bone will be resorbed and the teeth may loosen, or in more serious cases, lead to the phenomenon of tooth loss. Therefore, if you find that the calculus is dislodged, you should go to the hospital in time to remove the remaining part of the calculus to ensure oral health.