[单项选择] Wisdom Teeth Wisdom teeth are the last teeth to erupt. This occurs usually between the ages of 17 and 25. There remains a great deal of controversy regarding whether or not these teeth need to be removed. It is generally suggested that teeth that remain completely buried or un-erupted in a normal position are unlikely to cause harm. However, a tooth may become impacted due to lack of space and its eruption is therefore prevented by gum (齿龈), bone, another tooth or all three. If these impacted teeth are in an abnormal position, their potential for harm should be assessed. What are the Indications for Removing Wisdom Teeth Wisdom teeth generally cause problems when they erupt partially through the gum. The most common reasons for removing them are: Decay Saliva, bacteria and food particles can collect around an impacted wisdom tooth, causing it, or the next tooth to decay. It is very difficult to remove such decay. Pain a
A. Y
B. N
C. NG

[单项选择] Wisdom Teeth Wisdom teeth are the last teeth to erupt. This occurs usually between the ages of 17 and 25. There remains a great deal of controversy regarding whether or not these teeth need to be removed. It is generally suggested that teeth that remain completely buried or un-erupted in a normal position are unlikely to cause harm. However, a tooth may become impacted due to lack of space and its eruption is therefore prevented by gum (齿龈), bone, another tooth or all three. If these impacted teeth are in an abnormal position, their potential for harm should be assessed. What are the Indications for Removing Wisdom Teeth Wisdom teeth generally cause problems when they erupt partially through the gum. The most common reasons for removing them are: Decay Saliva(唾液), bacteria and food particles can collect around an impacted wisdom tooth, causing it, or the next tooth to decay. It is very difficult to remove such decay. Pain and infection wil
A. Y
B. N
C. NG