The MCP joint of the thumb is often affected by rheumatoid arthritis, but itâs unusual to replace it with an artificial one. Instead, the joint can be stiffened, allowing the joints next to it to make up for its loss of movement. This operation is usually effective at easing pain and improving pinching movements.
China is a civilization spanning some six thousand years and comprising a large fraction of humanity. There is evidence of man's prehistoric ancestors living in China some two million years ago, and modern man has lived in the area for at least 18,000 years, possibly much longer.
China is an East Asian country with a large territory, a huge population and an ancient history. With written records dating back 4,000 years, it is recognized as one of the four great ancient civilizations of the world, together with ancient Egypt, Babylon and India. Moreover, it is the only ancient civilization that has continued to this very day. China was one of the cradles of the human race.