Total knee replacement may be done on people, usually over 55, whose knees have been damaged by arthritis, trauma, or other destructive diseases of the joint resulting in severe limiting knee pain and significant stiffness, instability (constant giving way) and deformity (lock-knees or bowlegs) of the knee.
The Mexican government has a Federal District, which houses the federal government. The Federal District is a physical place and a territory, bordering Mexico City, which is the country's capital city. This is not counted as one of the states, and is much like the United States' District of Columbia.
It is a federal presidential representative democratic republic whose government is based on a congressional system, whereby the president of Mexico is both head of state and head of government, and of a multi-party electoral system.ystem is very sim â¦ ilar to the U.S. except that the president is elected by popular vote and there is no Electoral College.    Actually, the official name for Mexico is Estados Unidos Mexicanos or United Mexican States. federal represantatuive republic. 4 people found this useful.