3D Printing Is Transforming How Surgeons Train

Surgical education has long depended on a limited set of training tools — cadavers, animal models, and virtual reality simulators. Each addresses part of the problem, but none fully solves the challenge of preparing surgeons for the variability of real-world procedures. Now, a French collaborative team is demonstrating how 3D printed surgical simulators are bridging that gap, offering personalized, repeatable, and clinically validated training solutions.

The Problem With Traditional Surgical Training

As Mael Duportal, Additive Manufacturing and CAD Engineer at M3DPrint, explained at the AMA: Healthcare 2025 conference, the phrase “never the first time on a patient” hides a complex reality. “There are multiple first times,” he noted — the first time performing a procedure, the first time without a mentor present, the first time encountering a complication.

Each traditional training method carries significant limitations. Human cadavers raise ethical constraints that vary by country and cannot replicate pathology. Animal models offer live tissue but anatomically diverge from human patients. Virtual reality delivers repeatable procedural exposure but lacks credible tactile feedback. Commercial simulators produced by large manufacturers are useful at the entry level but cannot adapt to specific diseases or individual learning needs.

The fundamental gap is variability. Real surgical cases present with different anatomy, different pathologies, and different levels of complexity. No single static model can replicate that range.

Otosurg: A 3D Printed Ear Surgery Simulator

The Otosurg simulator was designed specifically for transcanal ear surgery — a technique that uses an endoscope inserted directly into the ear canal rather than incisions behind the ear. The shift from microscope to endoscope represents an entirely new skill set, and theimulator was built to serve two distinct user groups simultaneously: residents encountering otologic surgery for the first time, and experienced surgeons with decades of microscope-based practice who need to retrain for endoscopic technique.

“They can do at least six to eight cases in a day, which is not possible on a cadaveric model,” explained Professor François from AP-HP and Université Paris Cité. The training logic is sequential: a full day on the simulator across different pathologies and disease variants, followed by cadaveric work the next day. By that point, trainees already know the steps, where to make the incision, what to expect.

The simulator also allows instructors to tailor the experience to the individual, printing anatomical structures in non-physiological colors to highlight specific landmarks, or removing elements like the tympanic membrane entirely to isolate a particular stage of the procedure.

From CT Scan to Training Model: The Engineering Process

Juliette Prebot, Lead R&D Engineer at PRIM3D (AP-HP), described the development process as methodical and iterative. It began with requirements analysis and continued with direct observation in the operating theater and cadaver sessions.

The design phase used open-source tools: 3D Slicer for segmenting CT scan data into anatomical structures, and Blender for adapting those structures to manufacturing constraints. The ossicles, for example, are extremely fine in reality and had to be slightly enlarged to remain printable. The model was built as a modular system — a reusable base with interchangeable cartridges — and went through at least five full design iterations before reaching a validated version.

The final model uses Stratasys’ PolyJet printing for the anatomically critical zones, where multiple materials can be combined in a single build to replicate both hard and soft tissue. A key functional feature is the ability to add theatrical blood to the simulation, changing texture, introducing tissue adhesion, and replicating the visual complexity of a bleeding surgical field.

Validation and Commercial Adoption

Clinical credibility was built into the project from the start. The team conducted a formal validation study with a panel of experts and students, published in Otology & Neurotology, a prominent peer-reviewed journal in the field. The training framework incorporates OSATS evaluations — Objective Structured Technical Scores — a validated instrument for assessing surgical competency step by step.

The simulator is now part of a blended training course developed in collaboration with the University of Toronto, and is commercially distributed through M3DPrint across Europe, Canada, and the United States. Future development points toward a customizable catalog, allowing institutions to order cartridges tailored to specific pathologies or training objectives.

What This Means for Custom 3D Printing

The Otosurg project illustrates a broader trend: the convergence of medical imaging, open-source design tools, and multi-material 3D printing is creating entirely new categories of custom training devices. As Professor Simon noted, the hardware exists to produce clinically meaningful surgical simulators. The limiting factors are software flexibility, material openness, and the sustained clinical-engineering partnerships needed to turn anatomical data into validated training tools.

For businesses and institutions exploring custom 3D printing solutions, the healthcare sector offers compelling proof of concept. Whether it’s surgical simulators, anatomical models for pre-surgical planning, or customized prosthetics, the demand for personalized, high-quality 3D printed objects continues to grow across industries.

How TT3DPrint Can Help

At TT3DPrint, we specialize in custom 3D printing services that bring digital designs to physical reality. Using advanced FDM printing technology with Bambu Lab printer clusters, we deliver high-quality prototypes and production parts for clients across education, healthcare, gaming, and industrial sectors. Our team works with clients worldwide — from concept design to finished product — with international shipping via DHL, FedEx, and UPS.

Whether you need custom educational models, prototype components, or small-batch production runs, our team can help you turn your ideas into reality. Contact us today to discuss your project.

Conclusion

3D printing is no longer just a prototyping tool — it’s becoming an essential part of professional training, healthcare delivery, and custom manufacturing. As the technology continues to mature and costs decrease, we can expect to see even more innovative applications emerge across industries. The future of custom manufacturing is here, and it’s being printed one layer at a time.