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.
Law enforcement in Mexico is divided between federal, state, and municipal entities. There are two federal police forces, 31 state police forces (and two for the federal district) and one estimate suggests over 1,600 municipal police forces.here are 366 officers per 100,000 people, which equals approximately 500,000 in total, but systemic corruption is endemic and police forces are often poorly trained and underpaid.