The innermost tooth is broken.

Periapical periodontitis is caused by the spread of dental pulp infection to periapical tissues

. Therefore, it is

necessary to take anti-inflammatory drugs such as metronidazole tablets, amoxicillin capsules, etc. under the guidance of a doctor

.

Periodontitis is

caused by poor oral hygiene and plaque accumulation, resulting in inflammation of periodontal tissues, which leads to tooth loosening and loss. Regular cleaning, removal of plaque and dental calculus, prevention of periodontal disease.