Removal of calculus is not going to result in gaps because the calculus itself is a foreign body in our mouth and what remains exposed by its removal is our normal oral and periodontal tissues. It is true that many patients complained that after the scaling operation, they felt that the gap between their teeth had increased significantly. This is actually a misconception because the patient’s calculus has stayed too long and the normal gap between the teeth has been completely invaded by the calculus, resulting in a situation where the normal gap between the teeth is filled with calculus. In fact, after cleaning the calculus, the gap exposed in normal people is a normal gap, a physiological gap, and there is no need to worry about this gap. However, if it is for patients with periodontitis, the calculus itself will cause the gums to recede and the alveolar bone to resorb causing the teeth to loosen, and the loosening of the teeth will cause the gap between the teeth to increase significantly, which is also a pathological gap caused by pathological periodontitis, which is related to the calculus, but has nothing to do with the scaling operation to clean the calculus.