For a lost filling, crown, etc.: Cover the exposed area with sugar-free gum or orthodontic wax to avoid irritation.
For a toothache: Rinse your mouth with warm water and use an over-the-counter pain medication if necessary.
For severe bleeding: Apply pressure and a cold compress to the affected area.
For a knocked-out or dislodged tooth: Rinse the tooth off, place it back in its socket, and hold it there with gauze.