When surgery involves complex anatomy, the biggest challenge often comes before the first incision. Surgeons need to understand spatial relationships, anticipate risks, choose the right approach, and align the whole team around a precise plan. That is where patient-specific presurgical models can make a real difference.
Unlike viewing anatomy on a flat screen alone, a physical model gives the surgical team something they can hold, inspect, rotate, and use to simulate key decisions ahead of time. In practice, that can mean better preparation, fewer surprises in the OR, and a more confident surgical plan.[^1][^2]
1. Better understanding of complex anatomy
Presurgical models are especially useful when anatomy is unusual, distorted by disease, or difficult to interpret from 2D imaging alone. A physical replica can make vessels, fractures, tumors, defects, and anatomical constraints easier to understand at a glance.
In a multicenter study of 40 complex congenital heart cases, 96% of surgeons agreed or strongly agreed that 3D models improved their understanding of morphology and surgical planning. The model actually changed the surgical decision in 19 of 40 cases, showing that better visualization can do more than confirm a plan—it can reshape it.[^3]
2. More precise planning before entering the OR
Preparation improves when surgeons can test the case mentally and physically before surgery. With a patient-specific model, teams can review access routes, identify critical structures, evaluate implant sizing, and anticipate technical challenges earlier.
In a 106-case series across multiple surgical specialties, surgeons reported that presurgical 3D models were a better method than traditional 2D imaging for diagnosis and planning in 92.5% of cases. The surgical plan was changed in 37.7% of cases, and in 25% of cases the team changed operating-theatre equipment ahead of time after reviewing the model.[^2]
That matters because good preparation is not only about seeing anatomy more clearly. It is also about reducing uncertainty, aligning the team, and making practical decisions before the patient is on the table.
3. Shorter surgeries and less intraoperative burden
One of the strongest arguments for presurgical models is that better preparation can translate into measurable operative benefits.
A systematic review and meta-analysis covering 17 studies and 922 patients in orthopaedic trauma found that using 3D printing for preoperative planning was associated with an overall reduction in:
- operation time by 19.85%
- intraoperative blood loss by 25.73%
- fluoroscopy use by 23.80%[^1]
A second meta-analysis focused on acetabular fractures found similarly meaningful gains: 3D-printing-assisted surgery was associated with 38.8 minutes less operating time, 259.7 mL less blood loss, and 34.1 minutes less instrumentation time overall.[^4]
These numbers do not mean a model will transform every case. But they do show a consistent pattern: when surgeons prepare with a patient-specific model, complex procedures can become more efficient and controlled.
4. More confidence for the surgeon and the team
Preparation is not only technical. It is cognitive.
A useful presurgical model helps move decision-making upstream. Instead of solving everything under time pressure in the OR, the team can review the anatomy in advance, discuss alternatives, and build a clearer shared mental picture of the procedure.
In the same 106-case series, surgeons reported a positive impact on communication between surgeons in 92.6% of cases, and 42.7% reported reduced preoperative planning time. Surgical time was reported as reduced in 41.5% of cases, with estimated savings ranging from 20 minutes to over 100 minutes.[^2]
That combination—better understanding, stronger team communication, and less time spent improvising—can be a major advantage in high-stakes cases.
5. Faster and more accessible than many teams assume
One common concern is whether custom anatomical models take too long or cost too much to be practical. That is changing quickly.
In a 2025 randomized hepatobiliary study, researchers reported that AI-enhanced liver models were produced in a median of 3.52 hours at about $152 per model, and patients in the 3D-printed-model group had significantly lower intraoperative blood loss than those planned with digital simulation alone.[^5]
This does not mean every model can be delivered at the same speed or cost. Turnaround depends on segmentation complexity, imaging quality, anatomy, and printing workflow. But the direction is clear: high-value surgical models are becoming faster and more scalable.
Where presurgical models add the most value
Presurgical models are particularly helpful when the case involves:
- complex fractures or deformities
- congenital abnormalities
- tumor resections near critical structures
- difficult vascular anatomy
- implant selection or prebending needs
- rare or high-risk cases where rehearsal matters
The evidence today is strongest in complex and anatomically demanding procedures. The literature also shows some heterogeneity, and several reviews note that study quality is still mixed, so the technology should be seen as a powerful surgical aid rather than a universal replacement for conventional planning.[^1][^4][^6]
Final thought
The value of a presurgical model is simple: it helps surgeons prepare better before the case begins.
When the anatomy is clearer, the plan is sharper. When the plan is sharper, execution tends to be smoother. And when fewer decisions are left to intraoperative guesswork, the whole surgical process becomes more controlled.
If you want to bring that level of preparation to your next case, order your patient-specific presurgical model now on MedForm3D.
[^1]: Morgan et al. systematic review and meta-analysis in orthopaedic trauma: 17 studies, 922 patients, with reductions in operative time, blood loss, and fluoroscopy use; the authors also note that overall study quality was low and evidence remains heterogeneous. :contentReference[oaicite:0]{index=0}
[^2]: Thorn et al. study of 106 models used by 63 surgeons across multiple specialties: 92.5% found models better than 2D imaging for diagnosis/planning; surgical plan changed in 37.7% of cases; equipment changed in 25%; surgical time reduced in 41.5%; preoperative planning time reduced in 42.7%; communication benefits were also strong. :contentReference[oaicite:1]{index=1}
[^3]: Multicenter congenital heart study: 96% of surgeons agreed models improved understanding/planning, and surgical decision-making changed in 19 of 40 complex cases. :contentReference[oaicite:2]{index=2}
[^4]: Meta-analysis in acetabular fractures: 3D-printing-assisted surgery was associated with 38.8 minutes less operating time, 259.7 mL less blood loss, and 34.1 minutes less instrumentation time overall; authors called for more rigorous prospective studies. :contentReference[oaicite:3]{index=3}
[^5]: 2025 randomized hepatobiliary study: 64 patients; AI-enhanced physical 3D-printed liver models were produced in 3.52 hours at about $152 each, and the 3D-printed-model group had significantly lower intraoperative blood loss than the digital-simulation group. :contentReference[oaicite:4]{index=4}
[^6]: Reviews in this field consistently highlight promise, but also note heterogeneous methods, incomplete reporting, and the need for standardization before universal adoption. :contentReference[oaicite:5]{index=5}