A. Often called wear-and-tear arthritis, osteoarthritis is one of the most common forms of arthritis. The disease causes a breakdown of the cartilage that cushions the hip joint. As the cartilage breaks down, the result is bone-against-bone friction, leading to pain, eventual loss of movement, and the gradual weakening of unused muscles.

Q. How do I know if I have osteoarthritis of the hip?

A. Make an appointment with an orthopaedic surgeon who will evaluate your individual condition.

• X-rays will show if you have cartilage loss, abnormal change in bone density,
  or bony projections or erosions.
• A blood test will be taken to rule out rheumatoid arthritis.
• Your hip will be examined to evaluate range-of-motion and any deformities.
• You will b asked to describe the pain in your hip and to provide your medical
  history — injuries, infections, ailments, and medications you are taking.

Q. What is the Mini-Incision Hip replacement procedure?

A. Mini-Incision hip replacement is a less invasive alternative to traditional hip replacement surgery. It involves a much smaller incision and specialized surgical instruments. The surgeon replaces the damaged portions of your hip with a prosthesis to give you smooth and painless movement. The three parts of the prosthesis — the socket, ball, and stem — are made of a combination of metal and plastic.

Q. What are the benefits of having the Zimmer MIS Mini-Incision hip replacement procedure?

A. Results vary from person to person (due to factors such as weight, bone structure, and adherence to postoperative rehabilitation). The minimally invasive technique may offer you significant advantages over traditional hip replacement, such as:

• Smaller incision and scar — 21/2 to 31/2 inches,
  instead of the 10-to 12-inch standard incision
• Shorter hospital stay
• Faster rehabilitation

These benefits may allow a faster return to work and daily activities.

Q. How do I know if I should have the Mini-Incision hip replacement procedure?

A. The new technique is not for everyone. Candidacy for the procedure is based on several anatomical factors that must be assessed by your orthopaedic surgeon, including extent and pattern of arthritis and bone structure. People with the following factors typically are not candidates for this procedure:

• Obesity
• Recent history of deep vein thrombosis (DVT)
• Unstable medical conditions that may lead to a higher
  risk of complications
• Prior hip replacement surgery on the same hip