1.   I realized that I had a splitting headache and that my knee joints were uncertain of their purpose when I stood up.

2.   The final result is a permanently damaged knee joint.

3.   A top surgeon says the manufacturers of replacement hip and knee joints are making large profits at the expense of the Health Service.

4.   Although the ACL is small, it is one of the two main stabilizing ligaments of the knee joint.

5.   An ACL is a thin ligament that is the primary stabilizer of the knee joint and controls pivoting.

6.   A third of my knee joints were burned away.

7.   But Nicole will need physical therapy to learn how to use her ankle as a knee joint.

8.   He is now the first person in the United States to be fitted with a computerized knee joint that can practically anticipate his every move.

9.   He wears it only on his left leg because his right leg uses a different type of extension and foot attached to his remaining knee joint.

10.   His thighs are too big, developing too much power and pace for the knee joints to bear.