The development history of hip disarticulation prosthesis

China's earliest production of the traditional type of hip disarticulation prosthesis, the use of leather or aluminum receiving cavity and thigh tube and calf tube, the hip joint has a transverse axial joint, there is a side hinge with a lock, the knee is mostly hinged with a pin-type lock. This prosthesis is not only bulky, acceptance cavity and residual limb can not be full contact, and wear gait is not good, walking often can only be hip, knee joints lock, walk with a straight leg. Therefore, in the early 1980s with the introduction of modern prosthetic assembly technology was eliminated, and began production and assembly of synthetic resin made of Canada-style hip disarticulation prosthesis. In recent years, with the widespread use of skeletal prostheses and the introduction of component hip joints, large quantities of skeletal hip disarticulation prostheses have also been produced in China; however, the synthetic resin Canadian hip disarticulation prosthesis is still a mature hip disarticulation prosthesis, and its production cost is also lower.

At present, most of the skeleton hip disarticulation prosthesis assembled in China adopts the component hip joints produced by Germany Ottobock Company, mainly 7E4, 7E5 and 7E7 hip joints. 7E4 and 7E5 are the component hip joints with external stretching aid (rubber band), and the hinges of the joints and the center adjusting plate are made of alloy steel; the difference between 7E5 and 7 E4 is that 7E5 is attached with manual hip joint lock, which can be used in the standing position, and it can be used in the standing position. The difference between the 7E5 and 7E4 is that the 7E5 has a manual hip lock, which locks the hip joint during standing and walking, and is suitable for patients who require high stability (e.g., the elderly). 7E7 is a modular hip joint with a built-in extension aid (spring), with the extension spring mounted in a tube and a titanium alloy joint body. 7E7 is not only smaller, stronger, and more cosmetically appealing than the 7E4 or 7E5, but also easier to make alignment adjustments.