Design method of personalized 3D printing calcaneal plate based on topological optimization

Abstract

The invention provides a design method of a personalized 3D printing calcaneal plate based on topological optimization. The design method comprises the steps that firstly, three-dimensional reconstruction of a calcaneal model is conducted; then, a calcaneal outer side curved surface contour is extracted and constructed, construction of a calcaneal curved surface plate prototype and configuration of screws are conducted, and finite element analysis and topological optimization redesigning of a calcaneal prototype plate are conducted; and finally, 3D printing forming is conducted. According to the design method, based on the personalized treatment principle, limitation of traditional design and manufacturing technologies is broken through, the calcaneal height and reposition flatness of thearticular surface are effectively recovered, anatomic form matching and maximization of the fixation rigidity are achieved through combination of 3D printing and personalized manufacturing, and accordingly, the effect of calcaneal fracture plate internal fixation treatment is improved. According to the calcaneal plate designed through the design method, the problems of personalized anatomical compatibility difficult to achieve in a traditional calcaneus internal fixation plate, insufficient fixation stability and complications of related soft tissue of implantation materials are solved, shaping is easy, incisures are lower, biomechanical stability is better, and the risk of post-operation skin flap necrosis is lower.

Description

technical field [0001] The invention relates to the technical field of clinical repair and reconstruction of bone and joint injuries and the design of implantable medical devices, and in particular to a design method of a personalized 3D printed calcaneus plate based on topology optimization. Background technique [0002] Calcaneal fracture is a clinically common type of fracture, often caused by falling or crushing from a high place. Typical calcaneal fractures have the following characteristics: 1) Most fractures involve the subtalar articular surface: the anterior, middle, and posterior articular surfaces can be involved; 2) often accompanied by severe bone compression and collapse: vertical compressive load Severe articular surface collapse of the calcaneus with cancellous bone as the main structure occurs, and the internal cancellous bone is compressed, often after surgical reduction, there will be a cavity under the articular cartilage and lack of effective articular s...

AI Technical Summary

Problems solved by technology

However, the locking plate also has problems such as too large incision, difficult to shape, poor anatomical matching, and high risk of postoperative flap necrosis.

[0004] The above-mentioned traditional standardized calcaneal plate products are difficult to meet the needs of clinical fracture treatment in terms of anatomical matching, plate notch and support reconstruction effect, and the fixation effect cannot be individualized and optimized. Customized implantation of calcaneal plate has limitations such as high cost and difficult processing, which is not conducive to clinical application

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