Seasalt is also an ancient very effective means for toothaches.
Make a concentrated seasalt solution (brine) and take half a teaspoon into the mouth. Saliva will grow the volume of this solution into "a mouthful" in short time.
Spit out and repeat.
Salt is said to relieve from pain within minutes, even with open nerves of the tooth.
And salt does one more important thing:
It will clean out the tiny channels in the teeth very effectively. The downside is: your teeth get more sensitive.
From my own bad experience: do not take Colloidal Silver
onto the so cleaned teeth. The pain may be unforgettable: the silver particles will not go away by any means and produce a micro battery that stimulates the nerve directly for several days.
All the best!