There are no gaps when removing calculus because calculus itself is a foreign substance in the mouth, and what remains exposed by removing it is the normal oral and periodontal tissues. It is true that many patients complain that after the scaling operation, they feel that the gap between their teeth has increased significantly, which is actually a misunderstanding. This is a misunderstanding because the patient’s calculus has stayed for too long and the normal tooth gap has been completely encroached upon by the calculus, resulting in a situation where the gap is filled with calculus. In fact, after cleaning the calculus, the exposed gap is a normal gap, a physiological gap between our normal teeth, there is no need to worry. However, in the case of periodontitis, the calculus itself will cause the teeth to loosen and the alveolar bone to resorb. At this time the alveolar bone and gum resorption will make the gap between the teeth significantly larger, is a physiological situation, related to dental calculus, but with the cleaning operation of cleaning dental calculus has nothing to do.