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Clinical Basis for Creating an Osseointegrated Neural Interface.

Alison M Karczewski1, Weifeng Zeng1, Lindsay M Stratchko2

  • 1Division of Plastic Surgery, Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, United States.

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Summary

This study explored the feasibility of the Osseointegrated Neural Interface (ONI) for prosthetic control in humans. Findings suggest ONI is anatomically possible, guiding future surgical implementation for advanced limb restoration.

Keywords:
amputationclinical translationneuroprostheticsosseointegrated neural interfaceosseointegration (OI)peripheral neural interface

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Area of Science:

  • Biomedical Engineering
  • Neuroprosthetics
  • Surgical Anatomy

Background:

  • Advancements in neuroprosthetics are shifting amputation treatment approaches.
  • Osseointegrated Neural Interface (ONI) proposes transposing nerves into bone for prosthetic control.
  • Previous ONI research was limited to animal models.

Purpose of the Study:

  • To assess the clinical feasibility of creating an ONI in human anatomy.
  • To provide an anatomical basis for human ONI surgical implementation.
  • To evaluate nerve and bone morphometrics for electrode and implant design.

Main Methods:

  • Anatomical measurements of peripheral nerves in six human cadavers (3 upper, 3 lower limb).
  • CT imaging for bone morphologic evaluation and virtual implant placement.
  • Assessment of intramedullary space for neural interfacing hardware.

Main Results:

  • Sufficient anatomical space exists for ONI implantation in human limbs.
  • Smaller stem osseointegrated implants offer more intramedullary space.
  • Higher amputation levels reduce available intramedullary space.

Conclusions:

  • The study provides an anatomical foundation for human ONI development.
  • Results guide surgical strategies for osseointegrated endoprostheses with intramedullary electrodes.
  • Balancing endoprosthesis stability with interface space is crucial for ONI success.