用假牙固定劑將脫落的牙齒暫時貼番頂住可

1. Never.

By doing that, you will significantly increase your chance in bacterial inflection. Such inflection can be fatal.

You should see a dentist, but not trying to fix the problem yourself.

2. No.

假牙固定劑不能用於真正牙齒固定用，暫時頂住也不會起作用，更不會重新。
牙齒脫下不可能再植而重生。