Knee prosthesis insertion with the help of augmented reality technology

We have recently started using augmented reality (AR) to further improve the implantation of the artificial knee joint. This innovative procedure is combined with our proven and further developed soft tissue-orientated technique and has significant advantages over other methods.

Real-time projection of the leg axis and inclination of the joint surfaces

With the soft tissue-orientated surgical method, the ligament tension of the collateral ligaments is compensated during the operation and the rotation of the knee joint is physiologically adjusted before the new knee prosthesis is inserted. With augmented reality, the surgeon can perceive reality in real time using special glasses thanks to computer-assisted augmentation. They can see the knee joint to be operated on and, at the same time, the virtual leg axis and the inclination of the joint surfaces of the artificial knee joint, which must be balanced in extension and flexion with an individual, physiological leg axis. The surgeon cannot see this information without augmented reality glasses (AR glasses) due to the overlying soft tissue and skin.

Specialised surgical instruments send information to AR glasses

A special, reusable instrument set with markers is required so that the surgeon can see the conditions through the glasses. These are positioned at specific, predetermined points on the leg and are used to visualise the leg axes via the AR glasses. The markers are important for the precise and individualised positioning of the first bone cuts. The surgeon can check and, if necessary, improve the incisions thanks to the real-time transmission. In addition, the information that the surgeon sees via the AR glasses is transmitted to a screen in the operating theatre so that everyone present can follow the individual work steps.

The AR glasses are comparable to the head-up display in a car. Instead of speed information or other data, the operating surgeon is shown information about the leg axis and the degrees of inclination of the joint surfaces. The AR goggles allow a normal view of the surgical field and therefore do not need to be put on or taken off during the operation.

Advantages: better stability, more mobility and less pain

The soft tissue-orientated method combined with AR is less invasive, as the medullary cavity drillings in the femur, which are necessary for conventional alignment of the leg, are no longer required. Another significant advantage is that fewer aids need to be used. The AR technique also requires no additional trained personnel. With the combination of the soft tissue-orientated technique and the AR technique, we can place the new artificial knee joint even more precisely and physiologically, resulting in better mobility, more stability and less pain in the operated knee joint.

No substitute for surgical expertise

By using AR glasses, we are not leaving the operation to a machine, but still to the surgeon, thereby improving their precision. The surgeon's experience and skill are still important prerequisites for a successful operation. Choosing the right surgical method also plays an important role. Augmented reality allows us to achieve even better individualisation during the implantation of the artificial knee joint.

Book a consultation appointment

We would be happy to advise you in a personal consultation on the use of a knee prosthesis with the help of augmented reality technology.

PD Dr Andreas L. Oberholzer is a recognised expert in knee complaints and has extensive experience in the field of artificial knee joints.

Book your appointment directly online here or call us on +41 44 388 16 16. You are also welcome to come to us for a second opinion.