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Novel Positioning Feedback System as a Guidance in Bone Tumor Resection.

Vamiq M Mustahsan1, Guangyu He1, Carlos G Helguero2

  • 1Department of Mechanical Engineering, 189653Stony Brook University, Stony Brook, NY, USA.

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An inexpensive optical feedback system (OFS) improves the accuracy of bone resections using 3D-printed guides. This system reduces surgical errors by comparing real-time images to pre-operative plans, enhancing precision in bone cutting.

Keywords:
3D printingcomputer visionintra-operative guidancejig for bone surgeryresectionsurgical feedback technique

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Area of Science:

  • Orthopedic Surgery
  • Medical Imaging
  • Biomedical Engineering

Background:

  • 3D-printed guides enhance bone resection accuracy but still have errors.
  • Current methods lack precise intraoperative feedback for guide placement.

Purpose of the Study:

  • To develop and validate an inexpensive optical feedback system (OFS) for improving 3D-printed guide accuracy in bone resections.
  • To assess the OFS's ability to reduce clinically significant errors in surgical bone cutting.

Main Methods:

  • Developed an optical feedback system (OFS) comparing intraoperative 2D camera images to pre-operative plans.
  • Simulated bone resections on 24 cadaver femurs and 20 sawbones, measuring guide placement accuracy with OFS and CT scans.
  • Compared final bone cut accuracy with and without active OFS use.

Main Results:

  • OFS accurately depicted guide placement in transverse and sagittal planes (e.g., 0.87° ± 0.65° accuracy in transverse plane).
  • OFS use significantly increased final bone cut accuracy by 33-54.7% in rotation and translation.
  • OFS demonstrated high correlation between recorded and actual guide positions (r = .94 and r = .81).

Conclusions:

  • The OFS accurately depicts 3D-printed guide placement on bone.
  • This system significantly improves surgical accuracy for bone resections using 3D-printed guides.
  • Future development aims for a mobile application to enhance OFS accessibility and reduce processing time.