7 Dental Caries 龋齿

Patient：There ’ s a hole in my back tooth .患者：我后面的牙有个洞。患者：我补过的牙里的填充物掉出来了。Doctor：Do you have any pain ?Doctor：Does the tooth hurt when coming in contact with sweet or cold things ?患者：有一点痛。Doctor：It is a deep cavity , we ’ ll have an X-ray taken of that too ......