Our Summary

This study reviewed and analyzed data to understand how the artificial parts of a knee replacement, specifically the tibial components, move after surgery. The researchers looked at data from 53 studies, which included 2,470 knees. They found that most of the movement of the implanted part occurred in the first 6 months after surgery, then it usually stayed stable.

They also found that there are differences depending on whether the part is cemented or not. For cemented parts, there was no difference in movement whether the parts were all plastic, metal-backed, mobile or fixed. There was also no difference depending on the type of measurement method used. For non-cemented parts, there was some variation in movement, with the highest movement seen in parts that were not coated.

Overall, the study supports the idea that early movement of the replaced part can predict later need for revision surgery. The data also can be used to help evaluate future knee replacements.

FAQs

  1. Does the movement of the artificial knee components usually stabilize after the first 6 months post-surgery?
  2. Are there differences in movement for cemented versus non-cemented artificial knee parts?
  3. Can early movement of the replaced knee part predict the need for future revision surgery?

Doctor’s Tip

A helpful tip a doctor might tell a patient about knee replacement is to follow a structured rehabilitation program after surgery to improve strength, flexibility, and range of motion in the knee. This can help reduce the risk of complications and improve long-term outcomes. Additionally, maintaining a healthy weight, staying active, and practicing good posture can also help protect the new knee joint and prevent future issues. Regular follow-up appointments with your doctor are also important to monitor the success of the surgery and address any concerns or complications that may arise.

Suitable For

Patients who are typically recommended for knee replacement surgery are those who have severe knee pain that limits their daily activities, have significant knee stiffness or swelling, have knee deformities, have failed conservative treatments such as physical therapy or medications, and have moderate to severe arthritis in the knee joint. Additionally, patients who have difficulty walking or climbing stairs, have significant knee instability, or have knee pain that disrupts their sleep may also be candidates for knee replacement surgery. It is important for patients to discuss their symptoms and medical history with their healthcare provider to determine if knee replacement surgery is the best option for them.

Timeline

Before knee replacement:

  • Patient experiences chronic knee pain, stiffness, swelling, and limited mobility
  • Patient may have tried non-surgical treatments such as physical therapy, medications, or injections
  • Patient consults with an orthopedic surgeon who recommends knee replacement surgery
  • Patient undergoes pre-operative evaluations and tests to ensure they are a suitable candidate for surgery

After knee replacement:

  • Patient undergoes knee replacement surgery, which involves removing damaged parts of the knee joint and inserting artificial components
  • Patient stays in the hospital for a few days for monitoring and initial recovery
  • Patient begins physical therapy and rehabilitation to regain strength and mobility in the knee
  • Patient experiences some pain and discomfort during the initial recovery period
  • Over the next 6 months, the artificial components may experience some movement as the knee heals and adjusts to the new implants
  • After 6 months, the artificial components usually stabilize, and the patient can enjoy improved pain relief and mobility in the knee
  • Patient continues with long-term follow-up care to monitor the knee replacement and address any issues that may arise in the future.

What to Ask Your Doctor

  1. How long will the recovery process take after knee replacement surgery?
  2. What activities should I avoid after surgery to prevent complications?
  3. Will I need physical therapy after surgery, and for how long?
  4. What are the potential risks and complications associated with knee replacement surgery?
  5. How long can I expect the artificial knee joint to last?
  6. Will I need to have any follow-up appointments or tests after the surgery?
  7. Are there any restrictions on my daily activities or exercise routines after surgery?
  8. What type of anesthesia will be used during the surgery, and what are the potential side effects?
  9. How much pain can I expect to experience after surgery, and what pain management options will be available?
  10. Are there any alternative treatments or surgical options that I should consider before opting for a knee replacement?

Reference

Authors: Pijls BG, Plevier JWM, Nelissen RGHH. Journal: Acta Orthop. 2018 Jun;89(3):320-328. doi: 10.1080/17453674.2018.1443635. Epub 2018 Mar 6. PMID: 29508661