PREMOLARS
前臼齒
Adults have eight premolar teeth, two next to each canine tooth in the upper and lower jaw. Their job is to chew and grind up food.
成人長(zhǎng)有八顆前臼齒,分別位于上下顎犬齒后端,他們主要負(fù)責(zé)咀嚼與研磨食物的工作。
PROBLEMS: Premolars are more vulnerable to gum abrasions, caused by brushing teeth too harshly. This can lead to inflammation and, in the long term, gum -disease (causing teeth to fall out).
問題:錯(cuò)誤的刷牙方式常常會(huì)致使前臼齒的牙齦“受傷”,久而久之,則會(huì)引起牙齦疾病(從而發(fā)生脫落的現(xiàn)象)。