The black stuff inside the teeth is usually stains and in some cases tartar. In this case, it is recommended that the patient should undergo periodontal treatment on a regular basis, which can remove tartar and soft tartar from the gaps and roots of the teeth, as well as pigmentation and so on, through periodontal cleaning, which can effectively remove plaque and infectious substances and achieve the purpose of purifying the bacteria around the teeth, so that the teeth remain healthy, the gums are pink in color, and the gaps are clean. If there are black things between the teeth, it is recommended that the patient should go to the periodontal department of a regular hospital as soon as possible, early consultation can solve the problem as soon as possible, and can prevent the occurrence of periodontal disease.