Periodontitis is caused by the progression of gingivitis, where food debris or soft plaque around the teeth calcifies into tartar due to saliva, leading to further infection and disease of the periodontal tissues. This condition is known as periodontitis. The fundamental treatment for periodontitis involves removing the irritants, which means removing the tartar through teeth cleaning, followed by further treatment. After the tartar is removed, treatment can involve applying medication to the gums or performing bone graft surgery on the alveolar bone to aid in the recovery from periodontitis. Therefore, the initial step in treating periodontitis is teeth cleaning, which is also the first basic phase of treatment. After cleaning, medication is applied, followed by the maintenance phase for the teeth.