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Additive Manufacturing Applications on Flexible Actuators for Active Orthoses and Medical Devices.

Michele Gabrio Antonelli1, Pierluigi Beomonte Zobel1, Francesco Durante1

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Biomedical engineers utilized additive manufacturing, including fused deposition modeling (FDM) with ABS and PLA polymers, to create prototypes for innovative devices. This research advanced soft pneumatic actuators (SPAs), active orthoses, and endoscopic surgical tools.

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Area of Science:

  • Biomedical Engineering
  • Materials Science

Background:

  • Additive manufacturing (AM) is increasingly vital in biomedical engineering for rapid prototyping.
  • Traditional prototyping methods can be time-consuming and costly for complex biomedical devices.

Purpose of the Study:

  • To present research on biomedical devices developed using AM technologies.
  • To showcase the application of FDM printing with ABS and PLA polymers in creating functional prototypes.
  • To highlight the integration of finite element analysis (FEA) in the design process.

Main Methods:

  • Utilized fused deposition modeling (FDM) 3D printing with acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) filaments.
  • Developed innovative actuators, including pneumatic muscles and soft pneumatic actuators (SPAs).
  • Designed and prototyped an active lower limb orthosis and a variable-stiffness grasper for natural orifice transluminal endoscopic surgery (NOTES).
  • Employed finite element analysis (FEA) for design optimization and performance prediction.

Main Results:

  • Successfully prototyped advanced biomedical devices using FDM AM.
  • Demonstrated the feasibility of using common polymers like ABS and PLA for functional prototypes.
  • Developed functional soft pneumatic actuators (SPAs) and an active lower limb orthosis.
  • Created a variable-stiffness grasper suitable for NOTES procedures.

Conclusions:

  • Additive manufacturing, particularly FDM, is a powerful tool for prototyping in biomedical engineering.
  • The research successfully translated innovative concepts into functional prototypes for medical applications.
  • FEA combined with AM enables efficient development of complex biomedical devices.