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.
United States military deployments. The military of the United States is deployed in more than 150 countries around the world, with over 300,000 of its active-duty personnel serving outside the United States and its territories. US personnel are seeing active combat in Afghanistan.
Typical US Army deployments to conflict zones (Afghanistan, Korea, Bosnia, etc.) are one year, but commonly range anywhere between 6-18 months depending on the assigned mission and the levels of theatre deployment ready troops. Deployments under 6 months are rare across the board but do happen in done circumstances. I haven't heard of anything longer than 18 months, unless you count back to back deployments, but with the drawdown I doubt that's an issue anymore.