Composite diamond ene bone nail and its manufacturing method

Abstract

The invention belongs to the technical field of fracture fixation materials, and specifically discloses a composite diamondene bone screw, comprising an absorbable inner screw layer and a composite diamondene layer coated outside the absorbable inner screw layer, the thickness of the composite diamondene layer being The thickness of the absorption inner screw layer is 1‑1.5 times; the composite diamondene layer is prepared from nanodiamondene with a lamellar single crystal structure and absorbable materials, and the carbon atoms in the same sheet of nanodiamondene are sp3 orbital impurities The carbon atoms between the layers are connected by sp2 hybrid carbon bonds; the lattice spacing of nanodiamondene is 0.21nm; the average particle size of nanodiamondene is R, 20≤R≤500nm; The C content of nanodiamondene is 99-100%. The invention has simple structure, high strength and high safety.

Description

technical field [0001] The invention belongs to the technical field of fracture fixation materials, and in particular relates to a composite diamond-ene bone screw and a manufacturing method thereof. Background technique [0002] After internal fractures in human joints, anatomical positioning and internal fixation are required. Traditional internal fixation materials for fractures are generally made of stainless steel, titanium or alloy materials, which will cause corrosion, allergies, and stress shielding effects after long-term implantation. And lead to osteoporosis, easily lead to postoperative fracture again; at the same time, after the fracture heals, it is necessary to perform another operation to remove the internal fixation, which increases the burden and pain of the patient. The emergence of absorbable fracture internal fixation materials can reduce the number of operations, and it is not necessary to perform another operation to remove the internal fixation, which...

AI Technical Summary

Problems solved by technology

Although the use of absorbable fracture internal fixation materials has the advantage of avoiding secondary surgery, its own strength is not good enough, and internal fixation may become loose, deformed or broken when used on fracture ends with high stress; at the same time, its torsion resistance The strength is weak, and improper force will twist the nut or cause the screw to deform when it is implanted into the human body during the operation.

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