Periodontal disease is generally caused by long-term accumulation of bacteria, dental calculus, and plaque, which gradually stimulates chronic inflammation. Periodontal disease leads to inflammation around the tooth roots and results in the resorption of the alveolar bone, eventually causing the teeth to loosen and fall out. It is recommended that patients with periodontitis seek timely treatment to prevent the condition from worsening, which could complicate the treatment process. For those diagnosed with stage three periodontitis, treatment is generally still effective. Therefore, it is advised that patients promptly visit a hospital and follow the specific treatment methods prescribed by their doctor to effectively treat periodontitis.