President Adams did not call for a declaration of war, but hostilities began at sea. At first, American shipping was almost defenseless against French privateers, but by 1800 armed merchantmen and U.S. warships were clearing the sea-lanes. Despite several brilliant naval victories, war fever subsided.
All upper molars have 3 roots while lower molars have 2 roots. All premolars along with the other teeth have 1 root. Tooth number 5 is a premolar and has 1 root. Also if it is hurting while eating then you need to get the height of the crown increased.
The answer is time. When you have a root canal, what your doing is having the dentist go in and drill out the roots of the tooth, thus killing it off from blood supply. It does take time for the nerves that attach to the roots to realize that the tooth is dead... this can take several months.. It is those nerves that sense hot and cold.