3D Printing, Medical Models
How to Order a 3D Printed Veterinary Bone Model: From CT Scan to Surgical Rehearsal
By Mike Moussa, PE — A 3D printed bone model lets a surgeon rehearse the hard part of an operation the day before, not discover it mid-procedure. Here is exactly how to order one, what we need from you, and what you get back.
Why Surgeons Order Physical Bone Models
A CT scan on a monitor is a stack of 2D slices. Your brain has to assemble them into a 3D object in real time. A printed model removes that translation step — the fracture, the tumor margin, the malformed joint is in your hand, at 1:1 scale, before you ever make an incision.
The clinics and surgical teams we work with use printed models to:
- Rehearse the approach — confirm the osteotomy plane, screw trajectory, or plate fit on the bench instead of in the OR.
- Pre-contour hardware — bend a plate to a printed pelvis ahead of time and cut anesthesia time dramatically.
- Communicate with owners — a pet owner who can hold the model understands the procedure (and consents) far faster.
- Teach — residents and techs learn anatomy on a real object, not a textbook.
This is the heart of our veterinary bone model service: turning your imaging into a tool you can actually use.
What We Need From You
The single most important thing: send us the raw DICOM data, not screenshots. A JPEG of a CT viewer can’t be turned into a model. The DICOM series is the actual volumetric data, and it’s what our software needs.
The CT Scan
- Format: DICOM (.dcm), the standard export from any CT scanner. Most clinics can burn it to disc or export a folder.
- Slice thickness: thinner is better. Aim for 0.625–1.0 mm slices. Anything above ~2 mm starts to lose the fine detail that makes a model worth printing.
- Bone window/kernel: a standard bone reconstruction kernel gives the cleanest segmentation.
- Coverage: scan the full region of interest plus a little margin. We can’t model what wasn’t scanned.
What If You Only Have an MRI or X-rays?
MRI works for soft tissue but is poor for bone geometry — CT is strongly preferred for skeletal models. Plain radiographs (X-rays) can’t be turned into a 3D model at all; they’re projections, not volumes. If CT is your only path to a usable model, we’ll tell you honestly rather than sell you something that won’t help.
The Workflow, Step by Step
- You send the DICOM — secure upload, shared drive, or a disc in the mail. Include a note on what you’re planning so we segment the right structures.
- Segmentation — we isolate bone from soft tissue and convert the volume into a clean 3D surface (STL). Pathology, implants, and fine cortical detail are preserved.
- Review — for complex cases we send you the 3D model on screen to confirm we’ve captured what matters before anything prints.
- Printing — we print on the process that fits the use case (see below).
- Finishing & shipping — supports removed, model cleaned, and shipped to your clinic.
Typical turnaround is 2–5 business days from receiving usable DICOM. Rush cases are often possible — ask.
Which Printing Process for Which Model?
| Need | Best Process | Why |
|---|---|---|
| Pre-contour a plate, drill, cut | FDM (tough plastic) | Strong, cheap, takes a drill and screws without shattering |
| Fine detail, tumor margins | SLA (resin) | Captures sub-millimeter features and smooth cortical surfaces |
| Owner communication / teaching | FDM | Durable, handles repeated handling, low cost |
| Color-coded pathology | Multi-material | Highlight tumor, nerve, or implant in a contrasting color |
A Note on Sterility
Standard models are not sterile — they’re planning and rehearsal tools meant for the bench, not the sterile field. If you need a model in the field, sterilizable materials and processes exist, but they change material selection and cost. Tell us up front if intra-operative use is the goal and we’ll spec accordingly.
What It Costs
Pricing scales with size, complexity, and process. A single long-bone fracture model in tough plastic is inexpensive; a full pelvis with color-coded pathology in resin costs more. Most single-bone planning models land in a modest, predictable range, and we quote every job before we print — no surprises.
Have a case coming up? Send us the DICOM and a sentence about what you’re planning. We’ll confirm the data is usable, recommend a process, and quote it. If your scan won’t make a good model, we’ll tell you that too. We also build custom CAD models and reverse-engineer physical parts when you need more than anatomy.
Cases We Model Most Often
Some procedures benefit from a physical model more than others. The ones we see repeatedly:
- Complex long-bone fractures — comminuted or spiral fractures where reduction strategy isn’t obvious from slices alone.
- Angular limb deformity correction — planning corrective osteotomies, wedge cuts, and CORA placement on a model you can mark up.
- Pelvic and acetabular fractures — geometry that’s genuinely hard to read in 2D and unforgiving to get wrong.
- Oncologic resection — seeing exactly how a tumor relates to surrounding bone before committing to margins.
- Dental and maxillofacial reconstruction — fine detail where a smooth, accurate model pays off.
- Exotic and zoo species — where reference anatomy is scarce and every case is novel.
Quick Answers
Can you scale the model? We print 1:1 by default because that’s what makes hardware fitting and rehearsal meaningful. We can scale up small anatomy for teaching if you ask.
Can you print only the pathology? Yes — we can isolate and print just the fractured region, a single bone, or color-code the area of interest so it stands out.
What happens to my data? Your imaging is your patient’s record. We use it to build your model and don’t share it. Tell us if you need it deleted after the job and we will.
Can you mirror the healthy side? For unilateral injuries we can mirror the contralateral limb to give you a template of “normal” to reconstruct toward — one of the most useful tricks in deformity planning.