Lower limb prostheses replace the missing limbs of amputees and perform basic standing and walking functions. It is a whole composed of functional parts such as prosthetic socket, joint and prosthetic foot, connecting parts and external decorative materials. It has both function and appearance. During standing and walking, it supports the human body, moves harmoniously with the human body, and attaches reliably to the stump. Moreover, its appearance is symmetrical and harmonious with the healthy limbs to meet people's aesthetic needs.

After amputation, the condition of the stump is different, the amputation site is different, and the suitable prosthesis for installation is also different. Along with the development of the lower limb bones, modular, increasing the variety of the knee joint, knee joint uniaxial and multiaxial, which has a constant friction, four connecting rod bearing locking knee and friction, the knee joint, and the variable friction, hydraulic or pneumatic swing phase control of the knee joint, and a variety of combination products. Do you know what function knee joint should have about lower limb prosthesis on the premise of many choices? YOBAND will briefly introduce the functional differences and functions of lower limb prostheses for you in the following:

(1) The extension is not more than 180 degrees;

(2) The range of activity of extension and flexion is more than 150 degrees;

(3) With support phase control function, no knee cataplexy occurs when bearing (this can be solved by adjusting the fitting and alignment of the prosthetic socket)

(4) It has the control function of swing phase, which is nearly consistent with the swing of normal leg in flat walking;

(5) Step frequency can be changed.

Generally speaking, the cost of total knee replacement mainly includes hospitalization cost and artificial joint cost, which includes consultation fee, various examination fee and bed fee since hospitalization, and the general cost is about 30,000 to 40,000 yuan. The cost of artificial joints varies according to the type and brand of joints selected. Generally, the cost of domestic artificial joints is about 30,000 to 40,000 yuan, and the cost of imports is about 70,000 to 80,000 yuan.

(2) Classification of lower limb prosthesis knee joint

For amputees of different constitutions and levels of activity, the joints are designed for elderly people with low mobility and young people with exercise. In terms of material, there are stainless steel materials with high strength and large weight, titanium alloy materials with good strength, aluminum alloy materials with light weight,

There are also strong and lightweight carbon fiber composites. The combination of these different structures and materials forms a rich range of knee products that offer a wide range of options for amputees.

(3) Selection of knee joint

(1) For elderly thigh amputees who do not often move, locking knee joints can be selected without worrying about knee flexion and fall;

(2) For thigh amputees with long stump, knee joint can be controlled with consciousness.

(3) For thigh amputees with short stump, the stability of supporting phase should be given priority, and linkage knee joint or load-bearing self-locking knee joint can be selected.

(4) For thigh amputees engaged in heavy physical labor and living in poor road conditions. Optional free swing and fixed adjustable knee joint;

(5) For young patients with broken joints, they like to use the connecting rod knee joint with hydraulic device with good step frequency following;

(6) The knee joint of the Canadian hip prosthesis does not need to use load-bearing self-locking support phase control mechanism, swing phase control is also a light mechanical type.