Medical and Biotech

Spinal Anatomy, Captured in Durable SLS Nylon

A detailed section of the human spine.

Complex anatomical applications require manufacturing methods that can reproduce intricate geometries without compromising the detail captured in the original design. 3D printing provides the flexibility to turn highly detailed anatomical data into accurate physical models, making it possible to support testing and research applications that would be difficult or costly to produce through traditional manufacturing. By combining the right technology, material, and manufacturing expertise, we help organizations turn complex digital designs into reliable physical tools for real-world use.

Technology

Selective Laser Sintering (SLS)

Material

Nylon 12 (PA12)

Volume

One Spine

THE CHALLENGE

The client needed a highly detailed physical spine model for medical testing, but the complex geometry created significant challenges during both file preparation and production. The model originated from an organic 3D scan that contained broken mesh data and missing features. The client's initial in-house FDM print also struggled to reproduce the spine’s deep crevices and internal features without leaving visible scarring from support structures. This made it difficult to achieve the level of accuracy and surface quality required for testing, creating a clear need for a more reliable way to produce the final anatomical model.

Repaired Complex Mesh Geometry: Identified and corrected errors in the original spine scan to create a clean, feature-complete STL for manufacturing.
Validated the Design in Phases: Identified and resolved mesh errors in the original spine scan, then supported an initial FDM prototype to validate the geometry before transitioning to SLS for the final high-fidelity parts.
Eliminated Support-Related Defects: Transitioned to industrial SLS printing to reproduce deep crevices and blind holes without rigid support structures or surface scarring.
Delivered High-Fidelity Components: Conducted powder removal and media blasting for a clean, test-ready finish.

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why it worked

SLS was the right fit for this application because it allowed us to reproduce the spine’s complex organic geometry without the support structures required by FDM. The unsintered powder surrounding the part during printing supported the intricate features, deep crevices, and blind holes from every direction, eliminating the surface scarring that had affected the client’s initial FDM prototype. This made it possible to preserve the fine anatomical details needed for accurate physical testing.

Our phased approach also helped reduce risk while improving the final result. By first working with the client to correct the original scan data and validate the geometry through an initial prototype, we avoided committing to a high-end final print before the design was ready. Once the file was confirmed, SLS provided a reliable way to produce the final components with consistent detail and a clean finish, giving the client a test-ready spine phantom that accurately represented the original anatomical data.

Where a model like this fits

Complex anatomical models like this one are well suited to medical research, biomedical engineering, device development, and testing applications where accurate physical replicas of organic geometry are essential. They are especially valuable when a model contains deep cavities, internal features, or intricate structures that are difficult to reproduce cleanly with conventional manufacturing or support-heavy FDM printing. Our team can help take challenging scan-based designs from imperfect digital files through validation and into high-fidelity, functional parts—making 3D printing a practical option for organizations that need customized anatomical models without compromising detail or usability.