There are different types of prosthetic leg knee prosthesis, and there are many varieties, and the functions and performances they achieve are also different. The types of prosthetic leg knee prosthesis generally include mechanical knee joints, lockable knee joints, hydraulic knee joints, pneumatic knee joints, and smart knee joints. This article introduces the latter three types of prosthetic leg knee prosthesis.
1. Hydraulic knee joint. Due to the incompressibility of the fluid, the stance phase of the hydraulic knee joint is more stable and is more suitable for patients with high activity levels.
2. Pneumatic knee joint. Due to the strong compressibility of the gas, there is still a certain amount of compression after the valve of the pneumatic cylinder is closed, so its stability in the support period is slightly poor, but its obvious advantages are lighter weight and better flexibility in the swing period.

3. Intelligent knee joint. The smart knee joint is a relatively new technology. It has many built-in sensors to detect the state of motion, and then automatically adjusts the control cylinder according to the state. This kind of knee reduces the learning cost that patients must pay for using the prosthetic leg knee prosthesis, and the gait is more natural, but They weigh more.
A good prosthetic leg knee prosthesis can guarantee the stability of the patient during the stance phase (from heel strike to toe off the ground) and the flexibility of the swing phase (from toe off to heel strike), naturally Accomplishing walking, and enabling the patient to have a good gait, is also a determinant of overall prosthetic performance and longevity.