Knee

Dr Matthew Broadhead has a subspecialty interest and training in treating knee pain. He will ensure that all conservative options are considered prior to surgery using an evidence-based approach. He has experience in knee surgery for traumatic, inflammatory and degenerative conditions of the knee, with a particular focus on early recovery after surgery (ERAS) and further training in robotic-assisted knee replacement.

When do I need a knee replacement?

A knee replacement is typically recommended for people with severe knee arthritis who have not responded to other treatment options, such as medications or physical therapy. The decision to undergo knee replacement surgery is typically based on the severity of the pain and disability caused by the knee arthritis. In general, a knee replacement may be considered when:

The pain interferes with daily activities and is not relieved by other treatments
The knee joint is severely damaged and the range of motion is limited
The knee joint is deformed or has lost its normal shape

It is important to discuss the benefits and risks of the procedure to determine if a knee replacement is the right treatment option for you. Dr Broadhead will consider factors such as your age, overall health, and lifestyle when deciding whether a knee replacement is appropriate.

How is a knee replacement performed?

A knee replacement, also known as knee arthroplasty, is a surgical procedure in which the damaged parts of the knee joint are removed and replaced with artificial components. The procedure is typically performed under spinal and/or general anesthesia. During the procedure, an incision in the front of the knee will be made and the damaged bone and cartilage will be removed from the joint. The remaining bone will be prepared by smoothing the surfaces and shaping them to fit the artificial components, which are made of metal and plastic. The artificial components are then secured in place with cement or special materials that allow the bone to grow into them over time.

What is a knee replacement made of?

A knee replacement is made up of artificial components that are designed to replace the damaged parts of the knee joint. The components are typically made of metal and plastic. The metal components of the knee replacement are usually made of cobalt-chrome or titanium alloys, which are strong and durable materials that can withstand the wear and tear of daily activities. The plastic components of the knee replacement are typically made of polyethylene, a type of plastic that is smooth and wear-resistant.

The components of a knee replacement are designed to mimic the natural movement of the knee joint and allow the individual to perform activities of daily living, such as walking, climbing stairs, and standing for long periods of time. However, it is important to note that the artificial components of a knee replacement may not function exactly like a natural knee and may have some limitations.

How long does a knee replacement last for?

The lifespan of a knee replacement can vary depending on a number of factors, such as the individual’s age, weight, and activity level. In general, knee replacements can last for many years, with some studies suggesting that they may last for more than 20 years. In 2023, the Australian Orthopaedic Association National Joint Replacement Registry reported that the cumulative percent revision rate, for total knee replacements performed for knee osteoarthritis, was 7.7% at 20 years. However, it is important to note that knee replacements can wear out over time, and the artificial components of the knee joint may become loose or wear out. When this occurs, the knee replacement may need to be revised or replaced to maintain proper function and relieve pain.

What are the risks of knee replacement surgery?

Knee replacement surgery is a common and effective procedure for relieving pain and improving function in people with severe knee arthritis. However, like any surgery, knee replacement surgery carries some risks. Some of the potential risks of knee replacement surgery include:

Infection: There is a risk of infection after any surgical procedure. The risk of infection after knee replacement surgery can be reduced by taking antibiotics and careful wound care following surgery. In some circumstances, additional surgery may be required to clean the wound and remove the implant.
Blood clots: Blood clots can form in the legs or lungs after surgery, which can be dangerous if left untreated. Dr Broadhead may prescribe medications or recommend other measures to prevent blood clots from forming.
Bleeding: There is a risk of bleeding during and after the surgery. Dr Broadhead will take steps to minimize this risk and will monitor the patient for signs of bleeding.
Nerve or blood vessel injury: There is a risk of injury to the nerves or blood vessels in the leg during the surgery. Dr Broadhead will take steps to minimize this risk and will monitor for signs of nerve or blood vessel injury.
Implant failure: There is a risk that the artificial components of the knee joint may become loose or wear out over time, which may require additional surgery to repair or replace them.
Loosening: Over time, the artificial knee joint may become loose and may require revision surgery to tighten or replace the implant.
Fracture: There is a risk of the femur or tibia breaking during or after knee replacement surgery.
Allergic reaction: There is a risk of an allergic reaction to the materials used in the artificial knee joint.