The danger of not removing the root stump is that the root stump is not removed when the tooth is extracted, and the danger is the formation of apical inflammation, recurrent infections, and bad breath.
1. Apical inflammation: If the stump of the tooth is not removed, the bacteria inside the stump may go elsewhere through the apical foramen and develop into apical inflammation. Acute inflammation will cause pain, sometimes accompanied by fever and other systemic symptoms; chronic inflammation may form granuloma and then form apical cyst.
2. Repeated infections: Bacteria inside the tooth stump may cause repeated infections, and even gingival fistula. The sharp tip of the residual root can irritate the mucous membrane for a long time, leading to repeated ulcers.
3. Bad breath: If the residual root is not extracted, bacteria may multiply in the area, which will lead to bad breath in the long run.
To summarize, the residual root is not extracted more harmful, it is recommended to extract in time.