[Treatment decision for periodontal patients with history of cancer].

Radiotherapy and chemotherapy might change the healing process of periodontal disease by reducing there storability of the periodontal tissues, leading the increase of attachment lose and alveolar bone absorption. The primary periodontal lesions could be aggravated. Therefore, oral screening should be conducted before periodontal treatment, in order to eliminate dental focal infection, to stabilize the oral environment and to prevent and reduce complications after cancer treatment. The patient's general situation should be evaluated before the periodontal treatment too, so as to ensure the patient could tolerate the radiotherapy and chemotherapy in the short interval between diagnosis and treatment of cancer. The periodontal treatment should be more conservative than normal periodontal patients. The indication for tooth extraction in these patients should be less conservative.