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No low price for high prosthetics? I'm afraid this technology has disappointed you.

Industry Insights 2020-04-27 6 views

Scan the healthy limb with a 3D scanner to obtain a 3D model, and then generate a residual limb model through software mirroring to obtain suitable 3D data for the prosthetic model; Finally, it is printed into a physical object using 3D printing technology. This is the rapidly developing 3D printing technology in the field of artificial prosthetics in recent years

3D The application of printing technology in upper limb prosthetics can affect daily activities such as eating, grooming, dressing, and many activities that require control skills. Due to the complex nature of hand function, prosthetic substitutes for upper limb amputations cannot typically restore function to the same level as lower limb prostheses.

Traditional upper limb prosthetic products are highly differentiated- either they are cheap goods with only appearance but no practical function, or they are "luxury goods" that can only achieve certain functions but cost tens of thousands.. Some friends find it even more difficult to find a cost-effective product, but everyone can rest assured that the technology shared today can make it easy for you to have low-priced high-end prosthetic products.

This prosthetic handThe connecting rod and finger jointare designed based on the natural bending and extension process of the native finger, allowing it to couple well with the movement trajectory of the native finger during the natural bending and extension process.; Add underactuated components at appropriate positions to adjust the positional relationship between each finger joint according to the surface shape of the object when grasping, so that each finger joint can tightly adhere to the object. Improved the stability of grasping objects and avoided the defect of the coupled single degree of freedom finger mechanism that can only be grasped by fingertips during the grasping process. It is suitable for friends who have lost their index finger, middle finger, ring finger, or little finger.

Fingers are divided into traction mechanism and main mechanism. The traction mechanism consists of two fixed sleeves, which are respectively fixed on the adjacent finger joints of the damaged finger. The main mechanism consists of a fixed sleeve, a middle finger joint, a distal joint, an elastic element, and a connecting rod mechanism that connects the traction mechanism and the main mechanism. The fixing ring of the main body is fixed at the residual part of the disabled finger.

When fingers naturally bend and extend, adjacent fingers pull the middle and distal knuckles of the prosthetic to perform coupled movements. At this point, the elastic element does not deform, and the prosthetic limb has only one degree of freedom.

When a finger grasps an object, the base and adjacent finger segments simultaneously contact the object and stop the movement. Afterwards, the phalanx of the prosthetic contacts the object and stops moving. Afterwards, the prosthetic limb stops moving when the middle finger joint contacts the object, but due to the action of the elastic element, adjacent fingers can still drive the distal finger joint of the prosthetic to bend and extend until it contacts the object.

Compared to the traditional single grasping method of prosthetic hands, this type of prosthetic limb has a variety of grasping methods, strong adaptability, and can reproduce some of the functions and grasping characteristics of native fingers.; At the same time, the fake limbs are subjected to more uniform force, increasing the stability of grasping movements.

Application of 3D printing technology on lower limb prosthetic shells

TraditionalSpongeThe outer packaging of prostheses not only has poor aesthetics but also limits knee joint movement, while3D printed prosthetic shells are inexpensive, have high overall aesthetics, and stronger practicality.. Most importantly, everyone can customize and decorate the appearance according to the structure of their amputation site.

Currently, 3D printing technology can use a variety of materials to make shells with diverse styles. There is a type of hollow shell on the market, which has a hollow shape but high strength and load-bearing capacity. There are also some unique and cool prosthetic shells that make you instantly become a RoboCop.

3D The materials for printing prosthetic shells mainly include metal, titanium alloy, nylon, nylon fiberglass, and so on. Among them, nylon fiberglass is preferred by the public due to its advantages such as light weight, precise assembly, and high strength. Summer has made a ranking of the overall performance of these materials for everyone's reference,Nylon glass fiber>Nylon>Titanium alloy>Metal.

Many friends receive strange looks because they are worried about revealing their prosthetic limbs, but I want to say that being true to oneself is also a kind of sexiness. After all, life belongs to oneself and has nothing to do with others!

In addition, if you have any questions about 3D printing prosthetic shells, you can also leave a message below, and I will do my best to answer them.

Image source: Internet

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