C/F SEEN INTRA ORALLY — AS AFTER EFFECT OF RADIATION
1. Mucositis – inflammation of mucosa
2. Radiation caries – mainly due to radiation injury to parotid gland, causing smooth surface caries due to xerostomia
3. c/f –
— blackish discolouration of crown
--- affects labial + lingual surface of all teeth +cervical third
— patient also gives h/s of cancer – suspect radiation therapy

Rx – 1% NaF every day QN
Preventive method done soon after radiation