3D printing for medical and dental work: anatomical models, guides, temporaries

The requests reaching our workshop come from surgeons, dental technicians, research labs and healthcare schools. The need is rarely "print an implant". It is almost always a physical support: a bone model to rehearse an intervention, a jig to practise a gesture, a device mock-up before tooling. That is the practical scope of 3D printing for medical and dental work as we handle it.

Let us set the boundary immediately. We do not manufacture certified medical devices, implants, or parts intended to stay in the mouth or inside a sterile field. Medical 3D printing and dental 3D printing cover a broad non-implantable field — models, mock-ups, study jigs, prototypes, teaching aids — and that is where we operate. Anything falling under medical device regulation is directed to an approved lab or manufacturer.

The non-implantable scope, stated plainly

What we produce regularly:

• Anatomical models for study and planning: skulls, mandibles, pelvises, bone segments, simplified vascular shapes.
• Dental models: working models, wax-ups and aesthetic mock-ups meant for validation, not for extended wear.
• Non-sterile study jigs and guides, used upstream to rehearse a gesture or test an approach.
• Device prototypes: medical electronics enclosures, handles, sensor mounts, test mechanisms.
• Teaching aids for initial and continuing education.
• Workshop or practice accessories: organizers, instrument holders, equipment spare parts away from patient contact.

What we do not produce: implants, surgical guides used in theatre, definitive or worn temporary restorations, therapeutic splints. Those items require certified materials, traceability and a quality system that belong to a medical device manufacturer.

Anatomical models: from imaging to print

The data chain

An anatomical model usually starts from a CT or MRI acquisition in DICOM format. Segmentation — isolating bone, tooth or vessel — is an act of interpretation that belongs to the clinician or their dedicated software. We therefore work from an already validated mesh, in STL or 3MF, or in direct contact with the team that produced it.

Then comes preparation: closing holes, removing stray islands, reducing segmentation noise, thickening areas too thin to print. Meshes coming out of segmentation often carry several million triangles and need careful cleanup. Our practical recommendations are set out in our article on preparing an STL file.

Choosing the technology

For fine detail — cortical texture, tooth roots, small structures — MSLA resin remains the best option. We print at 25 to 50 micron layers, with smooth surfaces and crisp edges. The resins we stock cover standard, tough, ABS-like and flexible needs.

For large volumes, demonstration models or teaching parts handled by many people, FDM is cheaper and tougher. Usable build volume is around 25 cm per side. Beyond that, we split the model into sections with alignment keys and bond them: a full skull in two or three glued parts stays perfectly readable.

Dental 3D printing: realistic applications

Working and study models

From an intraoral scan or the digitization of a plaster cast, we print resin models at 25 to 50 micron layers. These serve occlusion analysis, patient communication, restoration design or archiving of an initial situation. When the plaster exists but the file does not, 3D scanning lets you start from the object itself.

Temporary restorations: the line to respect

An aesthetic mock-up tried on for a few minutes in front of a mirror is not the same object as a temporary crown worn for three weeks. The first belongs to validation and prototyping. The second requires a resin certified for prolonged oral contact and a declared manufacturer. We produce the validation mock-up; the worn part is made by a dental laboratory equipped for it. That split is clear, and it protects everyone.

Prototyping a device before tooling

This is the busiest part of our healthcare-related work. An equipment maker designs an enclosure, a sensor mount, an ergonomic handle: they need to hold the object before committing to a mold. We run iterations within a few days, with materials chosen for the test at hand. The logic of that short loop is described on our rapid prototyping page.

A few material markers:

• PETG: versatile and rigid, a sound compromise for early volumes.
• ABS and ASA: better heat resistance, suited to sanding and painting.
• Polycarbonate: higher stiffness and heat resistance, more demanding to process.
• Nylon and carbon-filled composites (PA-CF, PETG-CF): mechanical parts and loaded jigs.
• TPU: seals, membranes, soft test components.

Sterilization and cleaning: what to know

Three points deserve to be stated without ambiguity.

First, heat resistance. An autoclave cycle at 121 or 134 °C deforms PLA and PETG. ABS, ASA, polycarbonate and some nylons hold up better, but resisting heat does not mean being validated for sterile use.

Second, porosity. FDM layers create crevices that are hard to clean completely. Post-cured resin offers a smoother surface, and primer followed by varnish further improves handling. That remains a surface improvement, not a microbiological guarantee.

Third, biocompatibility. We do not present any material as certified biocompatible. A model intended for a sterile environment must go through an appropriate channel, or be packaged and used under a protocol defined by the institution.

How the cost is built

The price of an anatomical model depends on material volume, machine time, chosen layer height, the amount of support to remove and the requested finishing. A mandible in resin at 50 microns does not carry the same workload as a full skull, sectioned and painted by zone. A hollow model with 2 to 3 mm walls cuts material significantly without losing readability.

For a recurring professional need, send your files and constraints through our professional quote: we come back with a proposed material, technology and finish, and we flag whatever must be handed to a certified partner.

Frequently asked questions

Can you print a surgical guide used in theatre?

No. An implant or bone surgical guide is a medical device requiring certified resin, validated sterilization and a quality system. We do print non-sterile study guides, used upstream to prepare or teach a gesture, and we direct clinical guide production to an approved laboratory.

Which technology suits a bone model?

MSLA resin for fine detail and small parts, at 25 to 50 micron layers. FDM for large volumes, frequently handled models and tighter budgets. We often combine both on one project: model body in FDM, detail zones in resin.

Can a printed part be sterilized?

Not in a validated way in our workshop. Materials such as ABS, ASA or polycarbonate tolerate heat better, but layer porosity and the absence of certification rule out any promise. Surface disinfection is possible on a study model, taking the material's chemical sensitivity into account.

Do you work directly from DICOM files?

We prefer to receive a mesh already segmented and validated by the clinician, since segmentation is an act of medical interpretation. We then handle mesh repair, orientation, sectioning if needed, and printing. If you have neither a file nor a digital model, scanning an existing object is an alternative.

What lead time should I expect for an anatomical model?

It depends on size, layer height and finishing. A dental resin model prints quickly; a sectioned, sanded and painted skull takes several cumulative days of work. State your deadline with the request: we adjust technology and finishing to meet it.