5 months ago I went to a dentist and she had to remove and put back my 2nd molar to be able to extract my wisdom tooth.
The dentist literally pulled out the 2nd molar tooth from my mouth, then removed the wisdom tooth after struggling for 1 hour, then put the 2nd molar back to the socket after washing the socket.
I got scared, but guess what? It didn't fall out to this day!
(this is the picture from 5 months ago)