top of page

Understanding joint replacement surgery and rehabilitation

girl holding knee that hurts

Joint replacement surgery, also known as joint arthroplasty, is a medical procedure that involves replacing a damaged joint with an artificial one.

This type of surgery is commonly performed on the shoulder, hip, and knee joints. Whether due to arthritis, injury, or other conditions, joint replacement can significantly improve a patient's quality of life. This article will cover the reasons for needing joint replacement, the pros and cons, what is involved in the surgeries, the rehabilitation process, and the importance of considering pain and dysfunction over imaging alone.

Joint replacement is typically recommended for individuals suffering from severe joint pain and disability. Common reasons include:

  1. Osteoarthritis: The most common reason for joint replacement, osteoarthritis is a form of joint surface degeneration, which may lead to swelling, weakness, pain and stiffness.

  2. Rheumatoid arthritis: An autoimmune condition that causes inflammation in the joints, leading to pain, instability and deformity.

  3. Post-traumatic arthritis: Arthritis that develops after an injury to the joint.

  4. Avascular necrosis: A condition where the blood supply to the bone is cut off, causing the bone to die and collapse.

  5. Congenital joint disorders: Some individuals are born with joint abnormalities that lead to early joint degeneration.

Pros and cons of joint replacement surgery


  • Pain relief: One of the most significant benefits is the reduction or elimination of pain.

  • Improved mobility: Patients often experience better joint function and increased ability to perform daily activities.

  • Enhanced quality of life: With reduced pain and improved mobility, overall quality of life can significantly improve.


  • Surgical risks: As with any surgery, there are risks such as infection, blood clots, and anesthesia complications.

  • Longevity of the joint: Artificial joints may wear out over time and may need to be replaced.

  • Recovery time: Rehabilitation can be a lengthy process requiring commitment and effort.

While hip, knee, and shoulder replacements are the most common, other less common joints can also undergo arthroplasty. These include:

  • Elbow joint replacement: Used for severe arthritis or trauma, this surgery can relieve pain and restore function in the elbow.

  • Ankle joint replacement: Performed for severe arthritis, this can relieve pain and improve ankle mobility.

  • Finger and wrist joint replacements: Used for arthritis and other conditions affecting the hand, these surgeries can relieve pain and improve hand function.


Shoulder joint replacement involves replacing the damaged parts of the shoulder with artificial components. There are two main types:

  • Regular Shoulder Arthroplasty: Replaces the damaged shoulder joint with a metal ball and a plastic socket.

  • Reverse shoulder arthroplasty: Used when the rotator cuff is severely damaged; the positions of the ball and socket are reversed.

Hip joint replacement can be performed using different approaches and will include metal, plastic and/or ceramic materials:

  • Anterior approach: The surgeon accesses the hip joint from the front. This method often leads to faster recovery and less muscle damage compared to other approaches.

  • Posterior approach: The surgeon accesses the hip from the back. This is the most common approach and provides a good view of the joint.

  • Lateral approach: Access from the side of the hip, used less frequently but can be beneficial in specific cases.

Knee joint replacement can involve partial or total replacement:

  • Partial knee arthroplasty: Only the damaged part of the knee is replaced. This is less invasive and often has a quicker recovery.

  • Total knee arthroplasty: The entire knee joint is replaced with metal and plastic components.

Robotic technology is increasingly being used in joint replacement surgeries. Robots can assist surgeons with precise placement of implants, leading to better outcomes. This technology allows for personalized surgical plans based on the patient's anatomy, potentially reducing recovery time and improving the longevity of the artificial joint.

Rehabilitation after joint replacement surgery is a crucial part of the recovery process. It involves physical therapy to help restore strength, flexibility, and function to the joint and will includes exercises, advice, education, and hands on techniques such as massage and joint mobilisation.

Shoulder rehabilitation

  • Initial phase: Focuses on reducing pain and inflammation with gentle movements and exercises. A period of immobilisation in a sling is typical initially.

  • Strengthening/mobilising phase: Involves more active exercises to strengthen the shoulder muscles and get the joint moving.

  • Advanced phase: Includes more challenging exercises to restore function.

Hip rehabilitation

  • Initial phase: Begins with walking and gentle exercises to improve mobility. A period or time using a walking frame, or crutches is normal. Anterior approaches won’t have any limitations to sitting, unlike posterior which requires caution for the first 6 weeks not to flex beyond 90 degrees or cross legs.

  • Strengthening/mobilising phase: Incorporates exercises to build hip strength, mobility and stability. Aim will be to cease any gait aids such as crutches or waking sticks

  • Advanced phase: Aims to restore full function and prepare the patient for a return to normal activities.

Knee rehabilitation

  • Initial phase: Focuses on reducing pain, inflammation and swelling, and restoring movement with gentle exercises. A period or time using a walking frame, or crutches is normal.

  • Strengthening/mobilising phase: Involves exercises to strengthen the muscles around the knee and prioritises range of motion. Aim will be to cease any gait aids such as crutches or waking sticks

  • Advanced phase: Includes more intensive exercises to improve knee function, to achievement of normal daily activities, leisure and recreation.

Recovery time varies depending on the type of joint replacement and the individual patient:

  • Shoulder replacement: Typically, patients can return to most activities within 3 to 6 months.

  • Hip replacement: Most patients can resume normal activities within 3 to 6 months, though full recovery can take up to a year.

  • Knee replacement: Recovery can take 6 months to a year and is typically harder work that with hips and shoulders.

It is essential not to base the decision for joint arthroplasty solely on how an X-ray looks. The presence of joint damage on an X-ray does not necessarily correlate with the level of pain and dysfunction experienced by the patient. Many individuals with severe radiographic changes may not experience significant symptoms, while others with minor changes may have considerable pain and disability.

Joint replacement should be considered when pain and dysfunction severely impact daily activities and quality of life despite conservative treatments like medications, physical therapy, and lifestyle modifications. Avoiding unnecessary surgery based on imaging alone can prevent the risks associated with surgery and postoperative recovery.

Clinicians such as Physiotherapists and Osteopaths play a crucial role in both pre- and post-operative care for joint replacement patients. They help improve mobility, strength, and overall function through targeted exercise programs and manual therapy (hands -on) techniques.

Pre-habilitation involves physical therapy and exercise programs undertaken before surgery. Benefits include:

  • Improved surgical outcomes: Better physical condition before surgery can lead to better outcomes and quicker recovery.

  • Reduced recovery time: Patients who are stronger before surgery often recover faster.

  • Enhanced mental preparation: Helps patients understand the recovery process and sets realistic expectations.

In some cases, pre-habilitation in the form of targeted exercise programs can prevent the need for joint arthroplasty, particularly for hip and knee conditions. Strengthening the muscles around the joint and learning about pain and load management can reduce symptoms and improve function, delaying or eliminating the need for surgery.

Joint replacement surgery is a significant procedure that can dramatically improve the quality of life for those suffering from severe joint pain and disability. Understanding the reasons for surgery, the types of procedures available, and the rehabilitation process can help patients make informed decisions and achieve the best possible outcomes. With advances in surgical techniques and technology, the future of joint replacement looks promising, offering hope and relief to millions of people worldwide. However, it is crucial to consider pain and dysfunction over imaging alone and explore non-surgical options like prehabilitation and targeted exercise programs to ensure the best treatment approach for each individual.


bottom of page