So there was no extraction.
You said: 如果上麵的已經拔了,下麵這個沒用,但很難清理到,容易出蛀牙,我會把它拔了。
What do you mean "下麵這個沒用,..." ?
I really appreciate your response, as I am so nervous about this wisdom tooth. If I had an extraction before, I probably would not have been so nervous.