One of my teeth in the back hurts. 我后面的一颗牙痛。 I have a cavity in one of my lower back teeth and it hurts. 我下排后面的一颗牙齿蛀了一个洞而且会痛。 I have a loose tooth. 我一颗牙齿松了。 This tooth is loose. 这颗松了。 A tooth that had been worked on in Taiwan has started to hurt. 在台湾治疗的一颗牙齿开始疼痛。 The cap has come off. 牙套松了。 The filling has fallen out. 填补物掏出来了。 It hurts so much I can't sleep at night. 痛得我晚上都睡不着觉。
