The stuff in the gap between teeth is smelly and needs to be treated according to the specific reasons, including carrying out ultrasonic scaling as well as repairing cavities, as follows: 1. Ultrasonic scaling: In the treatment, ultrasonic scaling treatment can be carried out firstly, it is common in patients with sparse teeth and large gaps between teeth connections. This part of patients will often cause food embedment, if not cleaned, it will lead to local food decay and odor between the teeth, so it is necessary to carry out scaling treatment to completely remove the food residue between the teeth and periodontal pockets. Patients need to floss or brush at home everyday to remove the food inclusions on the adjacent surface thoroughly. 2.Repair caries: If the odor between the teeth is caused by the caries on the adjacent teeth, which leads to the frequent blockage of teeth. It is necessary to treat the tooth decay, that is, it is necessary to remove the infected and blackened tooth hard tissue, and then use other restoration methods such as composite resin or crown to restore the tooth adjacent completely, after restoring good adjacent, the food embedding will be relieved to a great extent.