WASHINGTON, June 12 (Reuters) - U.S. President Joe Biden postponed a meeting with the head of NATO and skipped his other public events on Monday to undergo his second root canal procedure in as many days, the White House said. Biden reported tooth pain on Sunday, prompting an X-ray examination and root canal treatment by a team from Walter Reed National Military Medical Center, according to a letter from his physician that was distributed to the press. Root canal procedures are common to treat infected teeth that cause pain, especially for older adults, said Asgeir Sigurdsson, endodontics chair at New York University's College of Dentistry. Biden previously underwent root canal procedures in the 1990s, as a senator overseeing the Supreme Court confirmation hearings for now Justice Clarence Thomas. NATO LEADER SEARCH HEATS UPA meeting with NATO Secretary-General Jens Stoltenberg and a reception for diplomatic personnel were rescheduled for Tuesday.

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Persons: Joe Biden, Karine Jean, Pierre, Biden, Kevin O'Connor, Kamala Harris, Asgeir Sigurdsson, endodontics, Sigurdsson, Clarence Thomas, Jens Stoltenberg, Harris, Stoltenberg, Trevor Hunnicutt, Tyler Clifford, Doina, Jonathan Oatis, Grant McCool Organizations: NATO, White, Walter Reed National Military Medical, Constitution, New York University's College of Dentistry, United, Thomson Locations: U.S, New, United States, Europe, Ukraine, Russia