Custom cranioplasty using stereolithography and acrylic

Area of Science:

• Neurosurgery
• Biomedical Engineering
• Medical Imaging

Background:

• Cranioplasty is a surgical procedure to repair skull defects.
• Existing cranioplasty methods vary, with customization and prefabrication showing promise for improved outcomes.
• Patient satisfaction and surgical efficiency are key considerations in cranioplasty.

Purpose of the Study:

• To introduce and evaluate an original technique for manufacturing customized cranioplastic implants.
• To assess the efficacy, cosmesis, and cost-effectiveness of patient-specific implants.
• To explore the impact of patient-specific biomodels on patient understanding and procedural experience.

Main Methods:

• Utilized computed tomography (CT) data to create 3D biomodels and master implants via stereolithography (SL).
• Employed mirroring and interpolation techniques for implant design based on existing anatomy.
• Hand-finished master implants were used to create moulds for casting custom acrylic implants.

Main Results:

• The customized implants led to reduced operating times and excellent cosmetic outcomes.
• Patients reported improved understanding of the procedure due to visualization of biomodels and implants.
• Two complications occurred: one infection and one implant requiring significant trimming.

Conclusions:

• The SL-based technique enables the simultaneous manufacture of accurate master implants and biomodels for custom cranioplasty.
• The method is cost-effective and improves patient comprehension, though computer manipulation and manufacturing times are notable disadvantages.
• Further refinement of the process may address identified limitations and optimize cranioplasty implant production.