A plastic spacer is placed between the two metal components and another plastic component is placed on the back of the knee cap. Together, these components simulate the mechanics of the natural knee joint. The knee replacement is designed to use the muscles and ligaments around the knee for stability. Patients begin weight bearing and motion of the knee the day after surgery and can usually walk with assistance in six to twelve weeks. Shoulder Replacement Shoulder arthritis can make common tasks such as reaching overhead, combing one's hair and putting on clothes a painful experience.
Shoulder replacement is an excellent choice for relief of severe arthritis pain.
The procedure may improve range of motion but the final result is unpredictable. The shoulder joint resembles a ball and socket and is stabilized by muscles and ligaments. The end of the humerus or arm bone, which forms the ball, is replaced with a metal prosthesis. One corner of the shoulder blade forms the glenoid or socket. Although the glenoid can be resurfaced with a plastic component, it often does not need to be replaced.