An implantable prosthesis with optimized mechanical properties

Abstract

The embodiment of the present invention discloses an implanted prosthesis with optimized mechanical properties, including an intramedullary implant, used for implanting the end of the self-damaged bone into a bone cavity; an external prosthesis; a percutaneous connecting rod, used for percutaneously connecting the The intramedullary implant and the external prosthesis; the bone-encapsulating load-bearing structure, including an annular surrounding wall for enclosing at least part of the outer surface of the end of the residual bone, a central platform that interferes with the end surface of the residual bone, and for adjusting the annular surrounding wall A torque adjustment mechanism for the diameter of the enclosed cavity formed by the wall and the distance between the central platform and the end face of the residual bone. The present invention uses the bone-encapsulated load-bearing structure to load the end face of the residual limb bone, optimizes the stress at the fracture of the residual bone, effectively improves the force distribution of the coupling structure between the intramedullary implant and the residual limb bone, and effectively reduces stress shielding. Enhance the overall bending resistance, closer to the mechanical transmission mechanism of normal human bones, greatly reducing the risk of failure.

Description

technical field [0001] The embodiments of the present invention relate to the cross field of mechanics and orthopedic medicine, in particular to an implanted prosthesis with optimized mechanical properties. Background technique [0002] Prosthetic limbs are artificial limbs that are specially designed and assembled to compensate for the missing limbs of amputees or those with limb insufficiency by means and methods of engineering technology. According to the characteristics of use, prosthetics can be mainly divided into decorative prostheses and functional prostheses. The main function of decorative prostheses is to improve the body, and its appearance is enough, while functional prostheses require strong mechanical properties in addition to aesthetics, so as to replace the functions of normal human limbs, such as standing, walking and other sports functions. [0003] At present, the most commonly used functional prosthesis clinically is the telescopic prosthesis. The metho...

AI Technical Summary

Problems solved by technology

Although this type of implanted prosthesis solves the disadvantages of traditional socket prostheses in transmitting force through soft tissue, on the one hand, it transmits force through the joint surface between the intramedullary implant and the inner wall of the bone cavity, and the intramedullary implant will exert pressure on the surrounding area. Bone tissue produces a stress shielding effect, which leads to loosening and failure of the intramedullary implant. On the other hand, there is no protective device at the end of the residual limb bone, and the overall structure has poor bending resistance after implantation, which has brought great harm to the health of the patient. Hidden danger

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