There are two common clinical cases of gum recession with large gaps. The first is physiological, as people grow older, even if the gums are very healthy, there is a slow recession process, this situation will gradually become larger, but this situation is not necessary to carry out special treatment, patients can apply good dental floss, good cleaning and oral cleaning can be. However, there is another clinical situation, that is, the gum recession caused by periodontitis and the gap between the teeth becomes bigger. For this situation, it is necessary to intervene as soon as possible, and it is recommended that patients go to a professional dentistry department to carry out systematic periodontal treatment for periodontitis, which generally includes supragingival cleaning, subgingival scraping, root surface leveling, etc., and can be considered in conjunction with the application of medication, including topical and oral medication, in order to control plaque and relieve the further growth of calculus. After all these treatments are completed, the periodontal hygiene will generally be much cleaner. At this point, periodontitis will cease to progress further and the enlargement of the gap between the teeth, will stop.