Key result
3D printing with Bézier geometric modeling demonstrates feasibility for producing customized prosthetic aortic valves.
Why the study?
The complex anatomical and physiological structure of the aortic valve root requires a geometric model to enable customized prosthetic valve production for cardiac surgery.
Geometric modeling and 3D printing can be used to produce customized prosthetic heart valves based on anatomical structures.
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Establishes feasibility of 3D-printed customized aortic valves via Bézier modeling; leaves open clinical translation pending in vivo validation.
Objective: The aortic valve complex is an anatomical and a physiological junctional structure. Its root morphology presents a complex junctional structure extending from the ventriculoarterial to sinotubular junction and consisting of three Valsalva sinuses and cusps to achieve an optimal physiological pump function of the left ventricle. In this research study, a geometric model of the aortic complex was created allowing input to make it applicable in cardiac surgery. Material and Methods: The aortic valve has a consistent shape that can be described mathematically, dependent on the root diameter. The geometric model of the mathematical structures was developed with the Bézier technique, that is, by obtaining a curve or surface that can be controlled by the designer. Primarily, the boundary Bézier curves of the aortic valve tissue to be modeled were determined, which then revealed a frame of the surface. In the next step, within this frame, aortic leaflets were obtained by interpolations. Results: After the threedimensional (3-D) computer-aided design display was finished in Blender, the aortic valve complex was exported as a stereolithographic document and a model of the aortic root was printed using polylactic corrosive fibers. Conclusion: Geometric modeling of heart valves obtained by threedimensional imaging can be used in the production of customized prosthetic valves. Evaluation of the anatomical structure features of the heart valves using geometrical modeling could be developed and adapted for other heart valves.
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Bozbuğa et al. (2022) studied Aortic valve disease. Geometric modeling using Bézier technique and 3D printing was evaluated on Creation of a 3D printed custom-sized aortic valve model. A geometric model of the aortic valve complex was successfully created using the Bézier technique and 3D printed, demonstrating the feasibility of producing customized prosthetic valves.
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