3D printed lower limb prosthetic socket liner and manufacturing method thereof

Abstract

The invention discloses a 3D printed lower limb prosthetic socketliner.The 3D printed lower limb prosthetic socketliner comprises a linerbottom and a liner body, wherein the liner bottom and the linerbody are both made of an elastomer material;the linerbottom is connected to the liner body, and the liner body comprises a patellar region corresponding to the patellar ligament, a popliteal fossaregion corresponding to the popliteal fossa, or a thigh base region corresponding to the inner side of the base of the thigh;the thickness of any one or any combination of the liner bottom, the patellarregion, the popliteal fossaregion or the liner bottom and the base base region is increased. At the same time, the invention also provides a manufacturing method of the 3D printed lower limb prosthetic socket liner. The socket linerdisclosed by the invention can fit a residual limb of a patient and enhance the comfort; and at the same time, the cushioning effect, the wearing comfort and the hanging effect of a prosthesis when the patient walks are favorably increased.

Description

technical field [0001] The invention relates to the technical field of assistive devices for disabled persons, in particular to a 3D printed lower limb prosthesis socket inner sleeve and a manufacturing method thereof. Background technique [0002] The socket of the lower limb prosthesis is one of the most important components of the lower limb prosthesis. The socket is composed of an outer hard shell and an inner lining with a certain degree of flexibility. The inner lining of the socket plays an important role in it. Contact, and together with the outer hard shell support the body weight, transmit the associated forces efficiently to the distal end of the prosthesis. [0003] Whether the lining of the prosthetic socket is suitable or not will directly affect the wearing comfort of the prosthetic and the overall function of the prosthetic, and is a very critical part of the prosthetic. [0004] Traditional lower limb prosthetic socket liners, various production techniques ...

AI Technical Summary

Problems solved by technology

[0004] Traditional lower limb prosthetic socket liners, various production techniques have their advantages, but there are also unavoidable defects: the traditional silicone liner and gel liner rely on negative pressure to absorb the liner on the residual On the limbs, it plays the role of suspension. The silicone lining and gel lining have relatively low technical requirements for orthopedists. Silicone and gel have a better affinity for human skin, but silicone lining and gel The rubber liner is airtight, and because of the negative pressure, it will oppress the nerves of the residual limb for a long time, which will easily cause skin problems of the residual limb and accelerate the atrophy of the residual limb; while the inner liner made of traditional prosthetic sponge has lower material cost, but Orthopedists need manual splicing. There are many splicing marks on an inner liner, and the comfort of the seams is poor when worn. In addition, the traditional prosthetic sponge has poor resistance to compression deformation and poor resilience. After a period of use, it will be flattened and lost. Elasticity increases the gap between the residual limb and the inner liner, further increasing the discomfort of wearing

[0005] The above traditional prosthetic inner liner, when the residual limb shrinks, not only the inner liner needs to be replaced, but also the part connecting the hard shell of the cavity needs to be replaced together, which is costly for the prosthetic user.

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