3D Printed Canine TPLO Models: How Pre-Surgical Planning Cuts OR Time and Improves Outcomes

The average TPLO takes 60 to 90 minutes in the operating room. Of that, a meaningful chunk is spent re-measuring, re-orienting, and second-guessing — not because the surgeon is uncertain, but because a CT slice on a monitor is not the same as a tibia in your hand.

Tibial Plateau Leveling Osteotomy (TPLO) is one of the most common orthopedic procedures performed on dogs in the United States. It is also one of the most geometry-dependent. Plateau angle, rotation, plate seating, screw trajectory — every one of those decisions is a 3D problem being solved from 2D imaging. A patient-specific 3D printed tibia changes that.

Why TPLO Is a 3D Problem

A TPLO involves rotating the tibial plateau to a target post-operative angle — typically 5 to 6.5 degrees. To do that, the surgeon makes a curved osteotomy with a TPLO saw, rotates the proximal segment, and fixes it with a contoured plate. The geometry that matters:

Pre-operative plateau angle (measured radiographically, but easier to verify on the print)
Saw blade radius matched to the tibial diameter
Rotation magnitude needed to hit the target post-op angle
Plate contour to match the medial tibial surface without compromising the joint
Screw trajectory through the proximal fragment, avoiding the joint capsule and the popliteal vasculature

Each of those decisions has a wrong answer that the surgeon learns about only after the saw has cut. A 3D print of the patient’s tibia, available the day before surgery, lets every one of those decisions be made, tested, and corrected on the bench.

From CT to Print: The Workflow

Our standard workflow for a TPLO model is five steps:

DICOM intake. CT slices from the referring clinic, ideally 0.625 mm or finer. We accept DICOM via secure upload.
Segmentation. The tibia is isolated from surrounding soft tissue and the fibula in our segmentation software. We can include the proximal fibula and the femoral condyles if joint planning is part of the case.
STL export and mesh repair. Holes, non-manifold edges, and floating shells are cleaned. The bone surface is preserved at sub-millimeter fidelity.
Printing. SLA in a tough resin for surgical-handling parts; PLA or PETG for ward-display models. SLA gives the cortical detail surgeons actually use; FDM gives the silhouette only.
Sterilization-ready finish. If the model will be in the sterile field, we provide it in a material that survives steam autoclave or, more commonly, EtO sterilization. We label each model with the patient name and case number.

Turnaround from DICOM receipt to shipped model is typically 48 to 72 hours.

What Surgeons Actually Do With the Model

In conversations with veterinary orthopedic surgeons we hear the same five uses:

Plate pre-contouring. Bending the TPLO plate to the model the night before — instead of bending it against bleeding bone — saves visible OR time and improves seating.
Saw radius selection. Holding the model and the saw blade together resolves the saw-size decision in seconds.
Rotation verification. A second print of the post-rotation geometry confirms the planned correction is anatomically sensible.
Client communication. Showing the owner a tangible model of their dog’s tibia is dramatically more effective than pointing at a radiograph. Consent conversations get shorter and informed-consent quality improves.
Resident teaching. Residents practice the osteotomy on a sacrificial print before performing it on the patient.

Print Material Matters

A bone model is not just a shape. The surgeon needs the cortical surface to feel like bone, the cancellous regions to be representable, and the model to take a screw without splintering if it is going to be drilled or tapped during planning. Our default material for surgical-handling TPLO models is a tough photopolymer with a Shore D hardness in the 80–85 range and sufficient strength to handle K-wire passage without catastrophic failure. For pure visualization models, PLA is fine and is dramatically cheaper.

For more on choosing the right print material for medical models — including the trade-offs between SLA, SLS, and FDM — see our overview of 3D printed bone models for veterinary surgical planning.

Cost, Sterility, and Reimbursement

A patient-specific TPLO model runs $125 to $275 depending on size, material, and whether the case is rushed. For practices billing per-procedure, the cost is recovered in saved OR time — typically 10 to 20 minutes per case — plus the improvement in client conversion when the owner sees the model. For board-certified surgeons performing high case volumes, the model often gets folded into the procedure fee directly.

When a Model Is and Isn’t Worth It

Not every TPLO needs a 3D model. A routine case in a medium-sized dog with a textbook plateau angle is a textbook surgery. Where the model earns its keep is in:

Toy breeds and giant breeds, where standard plates and saw sizes do not fit cleanly
Revisions and re-do TPLOs, where existing hardware and altered geometry complicate planning
Severe deformity cases (excessive plateau angle, torsional deformity, prior fracture)
Bilateral procedures, where a left-and-right pair of models simplifies the surgical-day workflow
Teaching cases, where a resident is taking primary on the procedure

Working With PartSnap

PartSnap prints patient-specific veterinary bone models for surgical planning, client communication, and teaching. We work directly with veterinary surgeons, specialty practices, and teaching hospitals. DICOM in, model out, on a turnaround that fits a surgical schedule.

If you are a veterinary surgeon performing TPLOs and want to evaluate whether a patient-specific model is worth the workflow change, we will print your first case at cost. Send us the DICOM and a brief description of the patient and we’ll have the model on your bench inside three days.

Inquiries: partsnap.com/contact. Existing case files welcome.