It is possible to consider applying desensitizing toothpaste after scaling, relatively speaking for patients who have not scaled their teeth for a long time, due to the exposure of dentin after scaling, when using some desensitizing toothpaste has a very good desensitizing effect. There are patients who only have their teeth routinely scaled every six months to a year, and in most cases there is not a lot of tartar in the mouth. After scaling, the patient does not have obvious symptoms of discomfort, so it is not a big problem whether the patient applies desensitizing toothpaste or not, but clinically, patients with more tartar do not scaling their teeth for a long time. After scaling, due to the exposure of dentin, there will be obvious painful hot and cold stimulation after scaling, and applying desensitizing toothpaste to desensitize the dentin is a good clinical treatment.