A kind of preparation method of degradable porous spider bone connector

Abstract

A preparation method of a degradable and enveloping porous structure 3D printed bone setter, the size and parameters of the bone setter are designed according to the image data of the middle end of the radius of the arm obtained by CT scan, and the bone setter is more suitable for the shape of the human bone. To protect and induce the formation of bone cells, the bone setter material is printed using a mixture of hydroxyapatite / scallop shell / deer melon polypeptide / resin, and after completion, the surface of the bone setter is coated with chitosan, and the invention prints The inside of the bone setter is modeled on the internal network structure of the loofah pulp, and its shape is modeled on the spider's multi-limb structure. The materials used can achieve degradable functions, and the internal structure design is more suitable for the bone structure. It has a higher specific surface area, which is conducive to cell growth. Climbing and growing, the multi-leg structure in shape can make the joint more firm and stable, and it is not easy to rotate and deviate.

Description

technical field [0001] The invention designs orthopaedic medical instruments or equipment, and particularly relates to a degradable, embracing porous bone connector. Background technique [0002] Fractures of the ulna and radius are one of the most common injuries in clinical practice, accounting for about 11.2% of the total body fractures. They are mostly caused by indirect violent injuries, and direct and torsional violent injuries are rare. [0003] In the course of treatment, the rate of malunion and nonunion is high. Improper treatment often leaves forearm rotation dysfunction. For treatment, closed reduction and external fixation are currently preferred in China, while open reduction and internal fixation are advocated abroad. For young people, fractures Fast healing time, small fracture displacement, easy closed reduction, and strong plasticity, but the opposite is true for middle-aged and elderly people. Generally, closed reduction and small splint or plaster externa...

AI Technical Summary

Problems solved by technology

[0003] During the course of treatment, malunion and nonunion rates are high, and improper treatment often leaves forearm rotation dysfunction. For treatment, at present, closed reduction and external fixation tend to be adopted in China, while open reduction and internal fixation are advocated abroad. For young people, fractures Fast healing time, small fracture displacement, easy closed reduction, and strong plasticity, etc., but for middle-aged and elderly people, the opposite is true. Closed reduction and small splints or plaster external fixation are generally used for conservative treatment, but forearm may also exist. Obvious angular deformity can lead to permanent loss of rotation function. During internal fixation, many patients are usually not suitable for secondary surgery to remove the fixation plate due to their own physical conditions. Bacterial infection or damage to bone cells and Occurs in peripheral nervous tissue

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