Objectives should make reference to the deliverables of the project. In the example above, the objective refers to the upgrade of the telephone system. If you can't get a sense for the deliverables that are needed to fulfill the objective, the objective may be written at too high a level.
Peppermint oil is applied to the skin for headache, muscle pain, nerve pain, toothache, inflammation of the mouth, joint conditions, itchiness, allergic rash, bacterial and viral infections, relaxing the colon during barium enemas, and for repelling mosquitoes.
Yes, it should help with the pain. Naproxen is a very good anti-inflammatory and usually with a toothache there is pain and inflammation associated with it.