I have used cell salt no. 9 Mag Phos to relieve my mum's and my brother's toothache a few times. I crushed the tablet in some water and asked them to drink and hold it in the area of their tooth pain. Swallow it after a few minutes. The tooth pain subsided within minutes, sometimes as fast as when holding the solution in their month.
Once my brother had an excruciating tooth pain which shoot up to his head. He said that your tears will just rolled down automatically from the intensity of the pain. I dropped a few drops of flower essence into his decayed wisdom teeth and set an intention for the flower essence to heal him in his highest good and the severe pain also subsided within minutes. The flower essence I used is made from the painkiller plant.
Lastly, there was another time where I applied Aura Soma Physical Rescue oil to his cheek where his tooth pain was located. I poured some oil onto my palm and just rubbed onto his cheeks. Then, I placed my palms on his cheeks and send healing prayers to his decayed tooth. And his pain also subsided within minutes. Intention and Faith seems to be very important. Combined with the appropriate "tool", it can work miracles! Hope my above experiences can help others.