Computer-Planned Knee Replacement

MyKnee®
MyKnee®
The use of new technology in total knee replacement can improve many aspects of the surgical procedure and your outcome after surgery. Computer-planned knee replacement involves getting a pre-operative MRI or CT scan to create a three-dimensional model of your knee. Your knee replacement is then planned out on a computer, and patient-specific instruments are manufactured. These patient-specific instruments are used to perform your surgery and achieve the computer plan.

Medacta MyKnee® Patient Matched Technology in Knee Replacement

What is osteoarthritis?

The knee joint comprises three bones: thigh bone (femur), shin bone (tibia) and kneecap (patella) the ends of which are covered by a smooth surface (cartilage) which allows movement.

The main cause of knee joint diseases is the wear of the cartilage: osteoarthritis. This wear is perceived as pain. In the case of advanced osteoarthritis, your doctor may suggest that you undergo a total knee replacement.

Why a Total Knee Replacement?

Total knee replacement surgery substitutes the damaged bone and cartilage of the joint with polyethylene (a plastic material) or metallic components.

The main benefits of a successful total knee replacement are:

  • Reduction in knee pain
    The pain will be rapidly and dramatically reduced.
  • Recovery of mobility
    With less effort, you will regain close to the original mobility of your knee.
  • Improvement in quality of life
    Your everyday activities and your social life won’t be limited by pain and reduced mobility anymore!
MyKnee®

Why choose a MyKnee® Total Knee Replacement?

MyKnee® technology enhances the benefits of a standard knee replacement by offering a more accurate, faster and less traumatic procedure, through the use of surgical instruments tailored to each patient.

MORE ACCURATE POSITIONING OF THE PROSTHESIS
MyKnee® fits the shape of the knee accurately, allowing precise preparation of the bone to receive the prosthesis.[1,2] It has been proven that an accurate positioning of the prosthesis leads to an increased survival of the implant.[3]

LESS TRAUMATIC PROCEDURE
The conventional procedures require opening the medullary canal of the bone in order to achieve a safe positioning of the surgical instruments used to position the prosthesis. MyKnee® eliminates the need of medullary canal violation by producing customized extra-medullary jigs. Clinical studies demonstrate that the blood loss and the risk of embolism significantly decrease if the medullary canal is left intact.[3,4,5]

FASTER OPERATION
The use of MyKnee® technology is very simple and straightforward. It potentially allows the surgeon to reduce the operating time, thus decreasing the time under anesthesia and the risk of infection.[6]

Conventional procedures and MyKnee®

The positioning of a knee prosthesis is performed using surgical instruments which prepare the bone to receive the prosthesis.

MyKnee® instruments are manufactured with the innovative 3D printed technology. This solution offers a very accurate manufacturing process and the highest design flexibility to match your knee anatomy. This allows your surgeon to utilize instruments specifically tailored for your knee, still respecting high quality standards.

The MyKnee® allows for preparation of the bones to receive the prosthesis while respecting the characteristics of your anatomy.

MyKnee®

The MyKnee® Adventure

1. Obtain an image of your knee
The surgeon will arrange for you to have a 3D scan (CT or MRI) of your hip, knee, and ankle.

2. Replication of your knee and creation of MyKnee®
Using the 3D scans, Medacta will create a 3D model of your knee and your personalized surgical instruments.

3. Surgeon analysis of the planning
Your surgeon will adjust the settings of your MyKnee® plan to match your anatomy, planning the position of your final knee implant.

4. Preparation for surgery
Prior to surgery, your surgeon will receive the 3D printed MyKnee® instruments and the 3D bone model which are specific for your knee. These instruments will be used to perform the surgery.

5. Enjoy your new knee!

MyKnee®

References

[1] Koch P, Müller D, Pisan M, Fucentese S, Radiographic accuracy in TKA with CT-based patient-specific cutting block technique, Knee Surg Sports Traumatol Arthrosc. 2013 Oct;21(10):2200-5.

[2] Anderl W et al, CT-based patient-specific vs. conventional instrumentation: Early clinical outcome and radiological accuracy in primary TKA; Knee Surg Sports Traumatol Arthrosc. 2014.

[3] Ritter MA. et al. Postoperative alignment of total knee replacement: its effect on survival. Clin Orthop. 1994; 299:153-156.

[4] Kalairajah Y. et al. Blood loss after total knee replacement: effects of computer-assisted surgery. JBJS Br. 2005 – Nov;87(11):1480-2.

[5] Kalairajah Y. et al. Are systemic emboli reduced in computer-assisted knee surgery?: A prospective, randomised, clinical trial. JBJS Br. 2006 Feb;88(2):198-202.

[6] Peersman G. et al. Prolonged Operative Time Correlates with Increased Infection Rate after Total Knee Arthroplasty. Hospital for Special Surgery Journal 2006 -Feb;2(1):70-2.

Copyright © 2021 Medacta