Dear Doctor: I’m a 53-year-old woman, and I’ve been athletic all my life. I’m in a soccer league and have a grinding pain in my right knee. I’ve had knee injuries in the past, and now I’m told I might need a partial knee replacement. Why would that be? What does it entail?
Dear Reader: The knee is the largest and most complex joint in the body. It consists of the lower end of the thigh bone, or fem…