m sorry but watever diagnosis your dentist
has made is not clear. Firstly a bent root doesn't cause that much pain
. Yes if it's your wisdom tooth (last molar tooth) then it might cause medium to severe pain .wisdom tooth are rarely in normal position and because of their abnormal position they cause pain while eating and while opening and closing mouth. But if it's first or second molar then their might be some decay/ infection
in the tooth because of which you are experiencing pain.
Also cleaning is not the treatment in your case.
So I suggest you take a second opinion. Also take your x-ray along.