The numbering runs from the center of the mouth to the back. In the upper right section of the mouth, for example, tooth number 1 is the incisor (flat, front tooth) just to the right of the center of the mouth. The numbers sit inside an L-shaped symbol used to identify the quadrant. The L is right side up for the teeth in the upper right.
Boko Haram crisis: US deploys troops in Cameroon. Read more about sharing. US President Barack Obama has announced that US armed forces have been deployed to Cameroon to help fight against the Islamist militants Boko Haram. The force, which will be 300 strong, will conduct airborne intelligence, surveillance, and reconnaissance operations in the region.
Military aircraft at a US airbase on Okinawa island, Japan. Photograph: Hitoshi Maeshiro/EPA The US military has a huge footprint across south-east Asia and the Pacific, particularly in Japan and South Korea. With North Korea threatening a missile strike on the US territory of Guam, here is an overview of US forces in the region. US military presence map Japan. There are more US military personnel serving in Japan than in any other country.