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Can custom 3D printed implants successfully reconstruct massive acetabular defects? A 3D-CT assessment.

Matthieu Durand-Hill1, Johann Henckel2, Anna Di Laura1

  • 1Institute of Orthopaedics and Musculoskeletal Science, University College London.

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
|May 20, 2020
PubMed
Summary

Custom 3D printed titanium implants accurately positioned for large acetabular defects. Postoperative 3D CT scans confirm precise placement, showing promising results for complex hip revision surgery.

Keywords:
computed tomographycustom 3D printed implantsimage analysis for component orientationpaprosky acetabular defectsrevision Hip surgery

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Radiology

Background:

  • Large acetabular defects pose significant challenges in hip revision surgery.
  • Custom implants offer a potential solution for complex anatomical reconstructions.

Purpose of the Study:

  • To evaluate the accuracy of custom 3D printed titanium acetabular component positioning using postoperative 3D computed tomography (CT).
  • To assess clinical outcomes including component accuracy, range of motion, and complication rates.

Main Methods:

  • Twenty patients with large acetabular defects received custom acetabular implants.
  • Postoperative 3D CT scans were compared with preoperative 3D CT-generated plans to measure component position accuracy in six degrees of freedom.
  • Clinical outcomes included Oxford hip score, walking status, and complication assessment.

Main Results:

  • 100% of components were within 10 mm of the planned center of rotation.
  • 95% of components had rotation within 10° of the planned position.
  • 58% of components were within 5° of the planned inclination and version.

Conclusions:

  • Custom 3D printed acetabular implants demonstrate high accuracy in positioning for large acetabular defects.
  • This approach shows promising clinical outcomes and accuracy in complex hip revision surgery.
  • Postoperative 3D CT is a valuable tool for assessing implant positioning accuracy.