I might need to see the video to understand fully what was claimed but clove would not kill the root of a tooth and feeling a great deal of pain in the tooth is a good indicator that the root was alive.

it sounds like the root was suffering tooth decay which caused the pain, and later caused the root to die.. using clove oil is very effective at masking the pain caused by tooth decay because it dramatically calms the nerves in the affected area.. it's good for lots of reasons..

Whats is Clove Oil for toothache?

Clove oil has been used to treat toothaches for hundreds of years. Toothache pain is soothed and relieved quickly with clove oil... It can also help to heal any damaged cells or tissues around the oral cavities and helping improve immunity for them...

It’s a vital antimicrobial that helps to work as a mediator to destruct or resist any type of fungal disease that may already be present or forming in your mouth. The clove oil for toothache has several minerals and proteins that release emulsifying acids for your oral cavity which will help to keep it fresh and clean once the pain has subsided...

It can even act as an antiseptic for your body by alerting your white blood corpuscles of the blood to prevent and fight against all antigens which cause contamination or infection...

It can help clean the digestive tract and keep it from harmful parasitic bacteria that often appear inside your mouth. This would help to prevent or eliminate future toothaches from occurring. It will act as a stimulant which will enhance the metabolism in your body. It’s imperative for the recuperation of energy, poor to fair blood circulation in your gums and physical fatigue that may occur...

- http://www.toothache-cures.com/clove-oil-toothache

Wisdom teeth shifting/trying to come in?