Personalized bone fracture plate and manufacturing method thereof

Abstract

The invention discloses a personalized bone fracture plate and a manufacturing method thereof. The bone fracture plate made from titanium or titanium alloy through 3D printing is in fit contact with the shape of a patient bone, and the surface of the bone fracture plate is provided with a hydroxyapatite film. The manufacturing method comprises the steps that 1, CTA scanning technology or MRI technology is adopted for carrying out three-dimensional radiographing on the paint bone, and three-dimensional data of the patient bone is obtained; 2, computer aided design is used for displaying the patient bone and determining the shape, size and the corresponding connection way of the bone fracture plate; 3, personalized bone fracture plate data is output, and a metal powder selective laser melting 3D printer is used for printing the bone fracture plate, wherein the adopted titanium or titanium alloy is of the particle diameter of 15-45 micrometers and is in a spherical shape; 4, vacuum heat treatment is carried out on the bone fracture plate obtained through 3D printing; 5, the hydroxyapatite film is produced on the surface of the bone fracture plate.

Description

technical field [0001] The invention relates to a bone plate and a corresponding manufacturing method. Background technique [0002] Bone plate refers to the internal fixation device for plate-shaped fractures with holes. Clinically, it is often used in conjunction with bone screws or bone wires. The existing bone plates are all in the shape of a straight plate, such as the metal bone plate for osteosynthesis implants specified in the YY0017-2008 standard. In this standard, there are two types of metal bone plates: straight and special-shaped, but no matter what type it is The metal bone plate is in the shape of a plate and is in a plane. Due to the natural physiological curvature of the appearance of healthy bone and grafted bone, the plate-shaped bone plate cannot perfectly fit the outer surface of the bone, so the fixation is not firm. During the operation, the doctor may use hand tools to correct the plate-shaped bone plate according to the shape of the connection sit...

AI Technical Summary

Problems solved by technology

Due to the natural physiological curvature of the appearance of healthy bone and grafted bone, the plate-shaped bone plate cannot perfectly fit the outer surface of the bone, so the fixation is not firm

During the operation, the doctor may use hand tools to correct the plate-shaped bone plate according to the shape of the connecting part, but the correction is not precise enough, and can only partially improve the fitting of the bone plate to the shape of the bone

In addition, the orthopedic treatment of the titanium plate will cause the lattice distortion of the titanium metal, generate internal cracks, and weaken the connection strength of the titanium plate

Moreover, manual correction requires multiple adjustments and attempts, prolonging the time of osteosynthesis

In this way, on the one hand, it makes the patient uncomfortable, which is not conducive to the recovery of the patient's bone, and at the same time, the fixation of the metal bone plate is not firm.

[0003] In addition, since the modulus of elasticity of the titanium plate is much greater than that of the human bone, the degree of deformation of the bone plate and the human bone is different under stress, and there will be micro-slip between the bone plate and the human bone, causing pain to the patient due to mutual friction

[0004] Third, titanium and titanium alloys also have other disadvantages

For example, it lacks biological activity, cannot induce calcium and phosphate deposition, and cannot form strong chemical bonds with surrounding bone tissue

Poor abrasion resistance, prone to aseptic inflammation

Stress concentration is easy to cause adverse consequences such as bone resorption around the implant

[0005] In the Chinese patent application number 201420464816.5, the application date is 2014.8.18, and the authorized announcement date is 2015.1.14, which discloses a tibiofibular fixation bone plate under the ankle. The contact is also a plane, therefore, it cannot be completely fitted with the patient's bone, and the above-mentioned technical problems also arise

The main reason for the above-mentioned technical problems is that it is difficult to form a surface that is completely consistent with the patient's bone through the existing manufacturing technology.

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