External fixator based on 3D printing technology

Abstract

The invention relates to an external fixation frame based the 3D printing technology. The technological process of the external fixation frame comprises the following three stages: (1) obtaining model data of the external fixation frame, obtaining shape data of an affected limb with a 3D scanner, and obtaining a computer aided design model through conversion; (2) designing the external fixation frame on a 3D model, namely the computer aided design mode; (3) manufacturing the external fixation frame with fused deposition rapid modeling equipment. The external fixation frame provided by the invention is manufactured through printing of a PLA material according to the fused deposition rapid modeling technology, so that the problems that the common external fixation frame brings discomfort to a patient due to low breathability and heaviness can be effectively solved; appearance data of the external fixation frame provided by the invention are based on 3D scanned morphological parameters of the patient, so that the protection and the fixation of the affected limb are not inferior to those provided by the common external fixation frame; through the hollowed-out design at reasonable positions, the skin breathing effect of the affected limb is enhanced, and the itching symptom of the affected limb in a hot season is effectively relieved; the external fixation frame provided by the invention adopts an integral hollowed-out structure and is provided with a plurality of tiny holes, so that a relatively feasible solution is provided to treating a fracture through the combination of external fixation and other external treatment means.

Description

technical field [0001] The invention relates to an external fixation bracket based on 3D printing technology, belonging to the technical field of orthopedics. Background technique [0002] Fracture is a common injury in daily life. After fracture, patients usually need to accept corresponding fixation measures to ensure the recovery of damaged bones. At present, the commonly used fixation measures are divided into two categories: external fixation and internal fixation. For external fixation, plaster and small splints are the most common external fixation devices. Plaster and small splint, due to the constraints of their materials and manufacturing process, the device itself is relatively bulky, the air permeability is not ideal, and usually cannot fit perfectly with the patient's affected limb. It will bring obvious discomfort to patients receiving external fixation. [0003] 3D printing technology is considered to be an important production tool that can represent the "t...

AI Technical Summary

Problems solved by technology

In 2008, Liu Jun of Nanhua University designed a new type of external fixation bracket with Kirschner bundle mesh support, which has the same design concept as this project, but there are differences in technical means

Because the reduction requirements of forearm double fractures are very high, manual reduction and external fixation often fail to meet the treatment requirements. Manual reduction and external fixation are related to factors such as experience and technology, but it is an indisputable fact that the reduction is difficult and easy to shift again.

[0009] 2. It is easy to cause dysfunction

Treatment with closed reduction and plaster external fixation, fracture disunion and malunion often occur, resulting in dysfunction

[0010] 3. There is a burning sensation when exothermic and poor air permeability

The plaster and water will react chemically, gradually harden and release heat. At this time, the patient will have a burning sensation, and the plaster support has poor air permeability, and the skin will cause epidermal peeling due to airtightness.

[0011] 4. Complications are prone to occur and affect fracture recovery function

Susceptibility to compartment syndrome, fracture nonunion, unfavorable mechanical environment due to improper fixation Rotational dysfunction

[0012] 5. Blood circulation disorder

It is precisely because the plaster cast is hard and fits tightly with the limbs, so it is difficult to adapt to the reactive swelling of the limbs after trauma, and it is easy to compress the limbs and cause many complications, such as compressive ulcers, compressive nerve paralysis and blood circulation disorders, etc. , can lead to severe limb necrosis

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