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3D Planning and Printing of Patient Specific Implants for Reconstruction of Bony Defects
Published on: August 4, 2020
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Patient-specific processes for occipitocervical fixation using biomodelling and additive manufacturing
Ganesha K Thayaparan1, Mark G Owbridge2, Robert G Thompson2
1Department of Neurosciences, Epworth Healthcare, 89 Bridge Road, Richmond, Victoria 3121, Australia.
Summary
This study introduces patient-specific 3D-printed implants and tools for occipitocervical fixation. This novel approach successfully treated a C1 fracture, restoring alignment and relieving pain without complications.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Medical Imaging
Background:
- Occipitocervical fixation is crucial for stabilizing the upper cervical spine.
- Pathologic fractures, such as of the C1 vertebra, present complex surgical challenges.
- Traditional methods may lack precision in achieving optimal spinal alignment.
Observation:
- A 79-year-old female with C1 fracture underwent surgery using patient-specific 3D-printed tools and implants.
- DICOM data enabled creation of 1:1 scale biomodels for surgical planning and intraoperative guidance.
- A custom titanium implant and stereotactic drill guide were designed and fabricated.
Findings:
- The patient-specific implant (PSI) was pre-contoured to match the patient's anatomy and planned neutral position.
- Stereotactic portholes on the PSI facilitated accurate screw placement.
- The technique achieved the planned occipitocervical alignment, simplifying screw fixation with the drill guide.
Implications:
- This integrated approach of biomodelling and 3D-printing offers a viable solution for complex occipitocervical fixation.
- Patient-specific implants and tools can enhance surgical precision and potentially improve outcomes.
- The method demonstrates successful treatment of a pathologic C1 fracture with symptom resolution and no complications.
