3D printing individual rib replacement prosthesis and preparation method thereof

Abstract

The invention discloses a 3D printing individual rib replacement prosthesis and a preparation method thereof. The replacement prosthesis comprises a prosthesis body and connecting pieces arranged at the two ends of the prosthesis body respectively, wherein the shape of the prosthesis body truly simulates the shape of a rib needing to be replaced, the prosthesis body is provided with two ports, andthe two ports are in matched butt joint with two disabled bone fractures to be rebuilt; the prosthesis body comprises an inner prosthesis and an outer prosthesis wrapping the periphery of the inner prosthesis, the portions, at the two ports of the prosthesis body, of the inner prosthesis are not covered with the outer prosthesis; the inner prosthesis has a micro-pore structure, and the outer prosthesis is of a smooth solid structure. The 3D printing individual rib replacement prosthesis can completely replace the rib defect part, and is firmly connected with a disabled bone obtained after therib is cut away, after the surgery, the micro-pore structure promotes the disabled bone to grow into the connection, original bone form recovery can be completed to the maximum extent, shifting is not likely to be caused after long-time use; the bone substance at the joint and peripheral blood vessels and nerves cannot be rubbed or damaged, and the service life is long.

Description

technical field [0001] The invention relates to the technical field of bone repair, in particular to a 3D printed personalized rib replacement prosthesis and a preparation method thereof. Background technique [0002] Thoracic tumors are one of the predilection sites for tumors and require surgical resection. The traditional surgical method is to completely remove the tumor and the involved ribs, and the lack of integrity of the thorax after rib resection will affect the cardiopulmonary function (thoracic function). Therefore, how to preserve the thoracic function after rib resection, that is, repair and reconstruction, is particularly important important. [0003] Reconstructive methods of rib resection include: direct suture, muscle flap, wire closure, Kirschner wire fixation, and artificial rib. The first four methods are only suitable for small rib defects, and the steel wire and Kirschner wire fixation have the disadvantages of loosening, rupture and pain. However, t...

AI Technical Summary

Problems solved by technology

The first four methods are only suitable for small rib defects, and the steel wire and Kirschner wire fixation have the disadvantages of loosening, rupture and pain

However, the existing prostheses (artificial ribs) on the market cannot make up for a large number of bone defects in the ribs, and the location and length of the rib defects in different patients are different, making surgical repair and reconstruction difficult, and the prosthesis does not match the original bone shape, so it cannot be accurately reconstructed

[0004] Moreover, the existing rib prosthesis cannot be integrated with the surrounding bones, does not have the functions of biological fixation, and there is a possibility of long-term fixation and loosening of the prosthesis

In addition, the traditional prosthesis will not only wear the bone at the joint between the bone and the prosthesis during the breathing movement of the thoracic cavity, causing the prosthesis to loosen, but also damage the nerves and blood vessels at the lower edge of the ribs

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