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.
The education system in Mexico can be divided into three main categories as follows: 1  EducaciÃ³n Basica Preescolar (preschool): Ages 3â6. EducaciÃ³n primaria (primary education): Grades 1â6. 2  EducaciÃ³n MÃ©dia Superior (Upper Secondary): Typically Grades 10â12 Profesional TÃ©cnico. Bachillerato.