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Design and Additive Manufacturing of a Biomimetic Customized Cranial Implant Based on Voronoi Diagram

Authors
  • Sharma, Neha1, 2
  • Ostas, Daniel3
  • Rotar, Horatiu3
  • Brantner, Philipp2, 4
  • Thieringer, Florian Markus1, 2
  • 1 Clinic of Oral and Cranio-Maxillofacial Surgery, University Hospital Basel, Basel , (Switzerland)
  • 2 Department of Biomedical Engineering, Medical Additive Manufacturing Research Group (SwissMAM), University of Basel, Allschwil , (Switzerland)
  • 3 Department of Oral and Cranio-Maxillofacial Surgery, “Iuliu Hatieganu” University of Medicine and Pharmacy, Cluj-Napoca , (Romania)
  • 4 Department of Radiology and Nuclear Medicine, University Hospital Basel, Basel , (Switzerland)
Type
Published Article
Journal
Frontiers in Physiology
Publisher
Frontiers Media SA
Publication Date
Apr 09, 2021
Volume
12
Identifiers
DOI: 10.3389/fphys.2021.647923
Source
Frontiers
Keywords
Disciplines
  • Physiology
  • Original Research
License
Green

Abstract

Reconstruction of cranial defects is an arduous task for craniomaxillofacial surgeons. Additive manufacturing (AM) or three-dimensional (3D) printing of titanium patient-specific implants (PSIs) made its way into cranioplasty, improving the clinical outcomes in complex surgical procedures. There has been a significant interest within the medical community in redesigning implants based on natural analogies. This paper proposes a workflow to create a biomimetic patient-specific cranial prosthesis with an interconnected strut macrostructure mimicking bone trabeculae. The method implements an interactive generative design approach based on the Voronoi diagram or tessellations. Furthermore, the quasi-self-supporting fabrication feasibility of the biomimetic, lightweight titanium cranial prosthesis design is assessed using Selective Laser Melting (SLM) technology.

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