Wisdom tooth extraction may be done by a dentist or an oral surgeon. Some dentists and oral surgeons recommend wisdom tooth extraction even if impacted teeth aren't causing problems, as a preventive measure against potential future problems.
An Ordinance for the Government of the Territory of the United States, North-West of the River Ohio, 1787. New York: s.n., 1787. The Northwest Ordinance, officially titled An Ordinance for the Government of the Territory of the United States North West of the River Ohio, was adopted by the Confederation Congress on July 13, 1787.
The North Pole, also known as the Geographic North Pole or Terrestrial North Pole, is (subject to the caveats explained below) defined as the point in the Northern Hemisphere where the Earth's axis of rotation meets its surface.