There are several causes for a hip replacement surgery. Osteoarthritis is one of the most common causes of hip degeneration. In this case, the hip joint simply wears out and must be replaced. Avascular necrosis is also a cause for hip joint degeneration. This condition, also known as AVN is an actual collapse of the ball portion of the hip. Other prior hip problems such as fractures or abnormalities in childhood can also lead to the eventual degeneration of a hip over time.
When it has been decided that a hip replacement is necessary, a prosthesis is put inside the body in the place of the hip. This is done through a size-appropriate incision to reach the hip joint. A prosthesis made of two parts -- the acetabular component (the socket), and the femoral component (the ball) -- are stabilized in the bone to form the new joint.
In this procedure, the hip is dislocated and the degenerative hip joint is removed. The prosthesis can be secured with bone cement or press fit components. Bone will grow into the press fit components.
There are several causes for knee replacement surgery. Osteoarthritis is the most common cause for a knee replacement. In this case, the knee joint simply wears out -- the cartilage on the ends of the bones wears away and allows the bones to rub against each other causing pain. Previous fractures or mechanical abnormalities can also call for a knee replacement, even if it may be years since the initial problem.
When it has been decided that a knee replacement is necessary, a knee prosthesis is put inside the leg in the place of the knee joint. This is done through an incision in the front of the knee to reach the joint. After reaching the knee joint, a prosthesis made of three parts -- the tibial component (bottom knee portion), the femoral component (top knee portion) and the patellar component (the kneecap).
In this procedure, the knee is measured and cutting guides are used to make perfect cuts for the femoral and tibial components to fit. Some components of the knees are press fit, much like total hips, while others are cemented. Both methods are accepted forms of fixation to bone for stabilization and function.
Therapy starts nearly directly after your surgery. Your mornings will be spent in Good Samaritan's therapy department where you will receive individual physical therapy sessions. In the afternoons, you will join the others in your group for therapy sessions in the day room on three north.
Upon your dismissal, you will be given specific instructions for continuing therapy at home. Should you need additional professional physical therapy, all arrangements will be made prior to your dismissal. In the event of your need for additional therapy, a home health professional will be arranged to visit you in your home to continue your rehabilitation.
Everyone heals differently and in varied amounts of time, however you should be able to resume an active life in four to six weeks.