Pure-titanium outer-hanging osseointegration artificial limb implant

Abstract

The invention belongs to the technical field of artificial limb repair and orthotics and discloses a pure-titanium outer-hanging osseointegration artificial limb implant. The implant comprises a fixing cap and a thread structure; the thread structure is formed in the fixing cap. According to the innovative outer-hanging osseointegration artificial limb, the bony joint of titanium and bone cortex can succeed as well to provide a fixing position, the tissue in the marrow cavity is not harmed, non-reversibility bone absorption caused when the bone cortex is subjected to stress shielding in a traditional artificial limb is reduced, and the exterior of the titanium artificial limb and the skin soft tissue can achieve good soft tissue integration; in addition, the space to vary the appearance ofthe outer-hanging implant is wide, a 3D printing technology of combining CT scanning with selective laser melting (SLM) and other methods can be used for customizing the porous titanium cap artificial limb implant, the inner face of the outer-hanging artificial limb is better matched with the appearance of the limb stub bone, the tissue in the implant grows into the inner face of the outer-hanging artificial limb, and the exterior better meets the demand for a more natural biological appearance and dynamics requirements.

Description

technical field [0001] The invention belongs to the technical field of prosthesis repair and orthopedics, and in particular relates to a pure titanium plug-in osseointegrated prosthetic implant. Background technique [0002] At present, most of the amputee patients caused by car accidents rely on movable socket-type prosthetics to repair their functions, but this kind of prosthesis is very inconvenient for the patient's sensory transmission and functional control. Prosthetics that greatly improve the function and feel of use. One after another, Germany and the Netherlands also began to study and apply it, bringing good news to amputees in Europe. After years of application and observation, it is found that the bone at the edge of the implant will resorb during long-term use, and some external connecting devices may be at risk of breaking. [0003] The currently standardized Swedish model percutaneous osseointegration prosthetic implant OPRA consists of three parts: intrame...

AI Technical Summary

Problems solved by technology

[0005] Existing osseointegrated prosthetic fixation devices are all implanted in the bone marrow cavity, which damages a large amount of bone marrow tissue and endosteum, affecting the nutrition and blood supply in the bone marrow cavity. The large difference in modulus causes obvious stress shielding. It is guessed that this is also the reason for the resorption and dissolution of the bone around the implant after long-term use. The regenerative ability of the bone part of the bone is still uncertain, which brings difficulties to the subsequent re-repair

The current traditional intramedullary prosthesis will cause bone resorption at the edge of the implant, which is one of the important complications that cannot be avoided and resolved by the current design

In addition, this design and the external connecting rod are thinner, and have been broken during load-bearing use, and complications such as surrounding infection have occurred

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