Ankle Joint Replacement
Ankle joint replacement, also known as total ankle arthroplasty (TAA), is a specialised surgical procedure used to treat osteoarthritis. Arthritis leads to cartilage loss, which can eventually cause chronic pain and/or deformity. The operation replaces worn cartilage and joints with synthetic or man-made components, and it is carried out by an orthopaedic surgeon.
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Ankle Joint Replacement Quick Details
WHO IS THIS FOR
People who have developed osteoarthritis in their 40s or 50s as a result of sports-related injuries in their youth. Older patients with chronic pain whose cartilage has degenerated gradually through ageing.
A technique known as keyhole surgery is used in ankle joint replacement. The operation usually takes between one and two hours.
You will normally stay in the hospital for two or three days after ankle replacement surgery. Your ankle will be supported by a temporary cast at first. You will need to keep weight off your foot and use crutches to cover short distances at home for six weeks.
Ankle joint replacement enjoys a high success rate among patients with age- or sports injury-related arthritis.
POTENTIAL RISKS & SIDE EFFECTS
Fracture of the bones on either side of the implant.
Injury to blood vessels, tendons or nerves.
Infection - any major surgical procedure carries a slight risk of infection.
Bleeding or blood clots.
Rejection - in a very few cases the ankle implant fails to heal into the bone.
What Is an Ankle Joint Replacement?
Ankle joint replacement is a specialised surgical procedure for the treatment of arthritis. Arthritis of the ankle joint is normally the result of ageing, the cartilage that covers your bones wears down and gradually becomes thinner and rougher. This causes the bone underneath the cartilage to thicken and it can also happen following sports injuries or also be caused by rheumatoid arthritis. Over time, wear to the cartilage and bone ends causes pain and swelling which is sometimes accompanied by decreased joint mobility or deformity. In ankle joint replacement surgery, the worn down ends of the tibia and talus bones are removed and replaced with man-made components made of metal or plastic.
How Does an Ankle Joint Replacement Work?
If you are considering ankle replacement surgery, it's likely that you have experienced chronic pain and reduced mobility due to arthritis. The procedure replaces the joint and the rough, worn bone ends with a polyethylene joint and smooth metal plates that move easily and without friction. Pain is massively reduced and, unlike other ankle procedures, there is no loss of mobility.
During your initial consultation, your orthopaedic surgeon will discuss the ankle joint replacement procedure with you and tell you about any alternative treatments. He or she will explain what will happen on the day of the operation and tell you what you should expect afterwards. You will undergo a short examination, and the doctor will go over your medical history. An x-ray of your ankle will be taken, and your blood pressure will be checked. Your doctor will ask you about any current medications, including herbal remedies and vitamin supplements. You should inform your surgeon if have any underlying medical conditions or allergies. You should avoid smoking and alcohol in the weeks leading up to your operation. The surgeon will also answer any questions you may have about the procedure or preparation and aftercare.
Ankle joint replacement surgery can be performed under a general anaesthetic or a nerve block. At your initial consultation, the orthopaedic surgeon will help you to decide which is the best option based on your general health and your medical history.
Ankle joint replacement is mainly performed using a technique called keyhole surgery. Your surgeon will follow these steps:
A tourniquet will be applied above the ankle to stop blood flowing into the ankle. This allows the surgeon to see more clearly.
An incision will be made on the front or side of the ankle. Sometimes, the primary incision is made on the front with two smaller incisions on either side of the ankle.
Clamps will be placed at the edge of the main incision to open the area and allow access to the damaged joint.
The ends of the talus and tibia will be cut to remove dead bone and create a smooth, even surface.
Smooth metal covers will be placed over the exposed bone, and a strong plastic replacement joint will be inserted.
Excess blood will be removed and the incisions will be stitched or stapled.
A special dressing with a hard back and soft front will be applied and the foot will be elevated.
Are There Different Types of Ankle Joint Replacements?
Although there is only one type of ankle joint replacement procedure, a similar alternative treatment is available:
Ankle fusion: The damaged ankle joint is removed and the ends of the talus and tibia bones are fused together. Your ankle won't be quite as flexible as before, and you may lose some mobility. However, although running isn't recommended for some time after the procedure, you will be able to walk comfortably.
What Should I Expect?
Ankle joint replacement is a major medical procedure, and you should follow the orthopaedic surgeon's advice step-by-step. You should expect to feel some pain in your ankle immediately after the operation. There will be some swelling, and you will have to keep your foot raised for a couple of days. You will be unable to put any weight on your foot for several weeks. During this time, a cast or special cast boot is worn to protect the foot and ensure that the ankle joint replacement components heal in place. Although you will be immobilised for six weeks, once you begin to walk again, your ankle will be flexible and movement will be pain-free.