The standard traditional remedy for tooth ache was to remove the tooth, but that is best avoided
Oil of cloves can ease pain by deadening the exposed nerves on a cavity, but it hurts a lot for about the first minute.
Ice
placed directly on a throbbing tooth will ease the pain.
A wad of cotton wool soaked in brandy can be squeezex against a cavity to numb the pain.
Oil of oregano is also favoured for pain relief on an aching tooth
A salt water mouthwash is an effective cure for mouth ulcers.