Our Summary

This research paper is about the use of a specific type of knee implant, called a rotating-hinge system, in total knee replacement surgeries. These implants are often used in more complicated cases where there is significant bone loss, instability in the connective tissues, or dysfunction of the muscles that extend the knee. However, these implants are now being used more frequently in simpler, primary cases as well. The researchers looked at a range of studies about these implants, specifically the third-generation models. They left out studies about earlier models and those used in revision surgeries. After reviewing the literature, they concluded that these implants should only be used in specific instances where the main issue is instability between the thigh and shin bones.

FAQs

  1. What is a rotating-hinge system in knee replacement surgeries?
  2. In what scenarios are rotating-hinge systems often used in knee replacement surgeries?
  3. What was the conclusion of the research study about the use of third-generation rotating-hinge systems in knee replacement surgeries?

Doctor’s Tip

A doctor might advise a patient undergoing knee replacement surgery to follow a comprehensive rehabilitation program after the procedure to ensure proper healing and regain full function of the knee. This may include physical therapy, exercises to strengthen the surrounding muscles, and taking prescribed pain medications as needed. It is important for the patient to follow the doctor’s post-operative instructions carefully and attend all follow-up appointments to monitor progress and address any concerns. Staying active and maintaining a healthy weight can also help to prolong the lifespan of the knee replacement and reduce the risk of complications.

Suitable For

Patients who are typically recommended for knee replacement surgery include those who have severe knee pain that limits daily activities, knee stiffness that prevents bending or straightening the knee, chronic inflammation and swelling that does not improve with rest or medication, and knee deformity such as bowing in or out of the knee. Additionally, patients with advanced arthritis, a history of knee injury or trauma, and failed previous treatments such as physical therapy or medication may also be recommended for knee replacement surgery.

Overall, the decision to undergo knee replacement surgery is based on a thorough evaluation by a healthcare provider, including a physical examination, imaging tests such as X-rays or MRI scans, and a discussion of the patient’s medical history and symptoms. The decision to use a rotating-hinge knee implant, specifically in cases of significant instability, bone loss, or muscle dysfunction, should be made in consultation with an orthopedic surgeon who is experienced in performing these types of surgeries.

Timeline

Before knee replacement:

  • Patient experiences chronic knee pain, stiffness, swelling, and decreased range of motion.
  • Patient undergoes various conservative treatments such as physical therapy, medications, injections, and weight loss efforts.
  • Patient may require the use of assistive devices such as canes or walkers to aid in mobility.
  • Patient undergoes pre-operative evaluations and tests to determine if they are a suitable candidate for knee replacement surgery.

After knee replacement:

  • Patient undergoes knee replacement surgery, where the damaged knee joint is replaced with an artificial implant.
  • Patient goes through a period of post-operative recovery, which includes pain management, physical therapy, and rehabilitation exercises.
  • Patient gradually regains strength, mobility, and function in the replaced knee joint.
  • Patient may experience some temporary limitations in activities while the knee heals and strengthens.
  • Patient eventually resumes normal activities and enjoys reduced pain and improved function in the replaced knee joint.

What to Ask Your Doctor

  1. What are the potential risks and complications associated with a rotating-hinge knee implant compared to a traditional knee implant?

  2. How long is the recovery time typically for a knee replacement surgery using a rotating-hinge system?

  3. Will I need any additional post-operative care or physical therapy if I receive a rotating-hinge knee implant?

  4. How long can I expect the rotating-hinge knee implant to last compared to a traditional knee implant?

  5. Are there any specific lifestyle changes or restrictions I should be aware of after receiving a rotating-hinge knee implant?

  6. What is the success rate of knee replacement surgeries using rotating-hinge systems compared to traditional knee implants?

  7. Will I still be able to participate in physical activities or sports after receiving a rotating-hinge knee implant?

  8. How experienced are you in performing knee replacement surgeries with rotating-hinge systems?

  9. Are there any alternative treatment options to consider before opting for a rotating-hinge knee implant?

  10. What can I expect in terms of pain management and rehabilitation after receiving a rotating-hinge knee implant?

Reference

Authors: Dauwe J, Vandenneucker H. Journal: Acta Orthop Belg. 2018 Sep;84(3):245-250. PMID: 30840564