Abstract
The periodontal treatment is generally devided into several steps. Namely, the elimination of inflammation or risk factors, clinical examination and diagnosis, treatment and maintenance. The tooth diagnosed with hopeless prognosis should be extracted at the point of clinical examination. Sometimes, however, we need to change the treatment schedule depends on the patient' s willingness. For instances, some patients do not want their own tooth be extracted even they know the corresponding tooth has hopeless prognosis. Once the patients lost their willingness to be treated, the overall prognosis might be influenced. For these circumstances, it should be extreamly important to make an effort to maintain the tooth in cooperation with the patiens. These efforts will make the patients actively join to the treatment and think about the importance of tooth maintenance.
