Prosthetic knee technology has changed dramatically over the past 20 years. From mechanical and hydraulic knees to microprocessor-controlled systems and today’s powered knees, advancements in technology continue to create new possibilities for people with lower-limb amputations.
In a recent discussion, Keith Cornell, CP, of Cornell Orthotics & Prosthetics explains how prosthetic knees have evolved and why powered technology could represent an exciting next step in prosthetic care.
From Microprocessor Knees to Powered Technology
According to Keith, microprocessor knees have been a tremendous advancement for the prosthetics industry. These systems use computer-controlled technology to manage resistance during flexion and extension, helping the knee determine when more resistance is needed and when movement can be easier.
This technology can make walking safer while reducing the amount of concentration required to control the prosthesis.
But, as Keith explains, the evolution doesn’t stop there.
The next exciting development is powered knee technology.
What Makes a Powered Knee Different?
Unlike passive prosthetic knees, which require the user to provide the energy needed to move the prosthesis, a powered knee contains a motor that can actively assist with movement.
Keith demonstrates how the technology can help the knee bend and extend with the right movement or gesture. This means the prosthesis is no longer simply responding to the user’s movement—it can actively contribute power.
One potential advantage is assistance with everyday movements such as sitting down and standing up. Instead of the user providing all of the force, the powered knee can help generate some of that power.
The Difference Can Be in the Everyday Steps
While powered knees can help with more demanding activities, Keith believes one of their most important benefits may actually be something much more familiar: walking on flat ground.
When the prosthesis can provide some of the power required for movement, the user may not have to work as hard to move the knee. This can mean less force being placed on the residual limb and less overall energy required to walk.
For someone who walks frequently throughout the day, that difference can be significant.
These advancements demonstrate how modern Prosthetic Solutions are increasingly focused on making movement more efficient and everyday activities easier for the person using the prosthesis.
Kevin’s Experience With a Powered Knee
Keith also shares the experience of Kevin, a longtime Cornell Orthotics & Prosthetics patient.
Kevin has an extremely short residual limb, which means his residual limb has to work particularly hard to move his prosthesis. Over the years, he has used several different types of knees, including mechanical and passive hydraulic systems.
After transitioning to a powered knee, Kevin found that regular walking became much easier.
For Keith, Kevin’s experience highlights an important point: the value of advanced prosthetic technology isn’t always about doing something extraordinary. Sometimes, it’s about making something as simple as walking feel easier.
Looking Ahead at Prosthetic Technology
The evolution of prosthetic knees shows how quickly technology continues to advance. Microprocessor knees have already changed the way many people experience stability and movement, while powered knees are introducing another level of assistance.
As Keith explains, the goal isn’t simply to use the newest technology. It’s about finding the right technology for the individual and understanding how it can support their specific needs and goals.
At Cornell Orthotics & Prosthetics, these advancements are part of a broader commitment to providing individualized Prosthetic Solutions that can help patients move with greater ease, efficiency, and confidence.
With powered technology continuing to develop, the future of prosthetic mobility is taking another exciting step forward.
