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Discover which conditions may benefit from knee replacement surgery. Compare surgical options, each tailored to address specific patterns of joint damage and restore function.
Living with knee problems can be incredibly challenging. Let us walk you through some conditions that might lead you to consider knee replacement surgery.
If you're dealing with Osteoarthritis, you're not alone. This common condition often develops as you age, making your knee painful and stiff. You might notice it's becoming harder to move around and complete everyday tasks that used to be simple.1
If you’re dealing with Rheumatoid Arthritis, your immune system is mistakenly attacking your own joints, causing inflammation, pain, and swelling.2 When other treatments haven't given you the relief you need, knee replacement can be an excellent option to consider.
Have you suffered a knee injury in the past? Post-Traumatic Arthritis can develop following an injury to your knee. Sometimes it resolves on its own, but it can become chronic, affecting about 12% of people with osteoarthritis. Your previous injury may have led to long-term changes in how your knee functions.3
With Avascular Necrosis, you might not notice symptoms initially, but as it progresses, you'll likely experience constant knee pain and stiffness. This happens when bone tissue dies due to loss of blood supply – perhaps from an injury, cancer treatment, steroid use, or in some cases, obesity.6
If you have been told you have knee alignments like knock knees or bowlegs these alignments can cause pain and limited mobility. Knee replacement surgery can help correct these issues when they're affecting your quality of life.
And if you've experienced a severe knee injury – perhaps a fracture or a tear – that has caused extensive damage, knee replacement might be your best option for getting back to the activities you enjoy.
Remember, everyone's journey is different, always consult your surgeon to diagnose your condition and choose the best solution.
When we're talking about knee replacement surgery, you'll generally have one of two main options to consider – partial or total knee replacement.4
Your orthopaedic surgeon will help determine which approach is right for you based on several factors you'll discuss during your consultation with them. Your Surgeon will look at the extent of damage to your knee, your age, your activity level (both current and what you hope to achieve), and your overall health.
You'll have the opportunity to discuss various knee implant options and choose what's best suited for your situation. These implants are made from different combinations of metals, plastics, and ceramic materials. The good news is that implant design has improved significantly over time, which means better outcomes for patients.5
If you are recommended a total knee replacement, it's because your entire knee joint needs to be replaced. This is typically the best option when:
With a partial knee replacement, only one section of your knee will be replaced. This approach means less surgery, less tissue damage, faster recovery, and we get to preserve more of your natural knee structure. This is recommended when:
1. HealthDirect Australia. (n.d.). Osteoarthritis. Retrieved April 24, 2025, from https://www.healthdirect.gov.au/osteoarthritis
2. Musculoskeletal Australia. (n.d.). What is rheumatoid arthritis (RA)? MYRA. Retrieved April 24, 2025, from https://myra.org.au/article/your-arthritis-what-ra/what-rheumatoid-arthritis-ra
3. Dilley JE, Bello MA, Roman N, McKinley T, Sankar U. Post-traumatic osteoarthritis: A review of pathogenic mechanisms and novel targets for mitigation. Bone Rep. 2023 Jan 30;18:101658. doi: 10.1016/j.bonr.2023.101658. PMID: 37425196; PMCID: PMC10323219.
4. InformedHealth.org [Internet]. Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006-. Osteoarthritis of the knee: Learn More – What are the different types of artificial knee joints? [Updated 2024 May 15]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK544988/
5. Verywell Health. "Partial vs. Total Knee Replacement Surgery." Updated on May 11, 2024. Medically reviewed by Scott Zashin, MD. Available at: Verywell 6,Health.
6. Matthews AH, Davis DD, Fish MJ, et al. Avascular Necrosis. [Updated 2023 Aug 28]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK537007/
7. Vasso M, Antoniadis A, Helmy N. Update on unicompartmental knee arthroplasty: Current indications and failure modes. EFORT Open Rev. 2018 Aug 1;3(8):442-448. doi: 10.1302/2058-5241.3.170060. PMID: 30237902; PMCID: PMC6134885.
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