Knee Model with Pre-made Tunnels for ACL Reconstruction – Cross-Pin Femoral Fixation (Surgical Training)

## What is this?

A 3D-printable knee model (distal femur and proximal tibia) with pre-made bone tunnels for anterior cruciate ligament (ACL) reconstruction with cross-pin femoral fixation. In this technique, a transverse pin is passed from the lateral femoral cortex across the femoral tunnel, and the graft is looped over the pin, providing suspensory fixation inside the femur.

This model is part of a series of knee ligament reconstruction models developed by the orthopedic surgical simulation group of Hospital de Clínicas – Universidade Federal do Paraná (UFPR) and the 3D Printing Laboratory of the Centro de Simulação Profª Leide Parolin Marinoni, Curitiba, Brazil.

## What is it for?

- Teaching cross-pin femoral fixation in ACL reconstruction

- Understanding the relationship between the transverse pin and the femoral tunnel

- Practicing graft passage, looping over the pin and tibial fixation outside the operating room

- Comparing fixation methods with other models in the same series (e.g., interference screw, cortical suspension button, screw post)

- Hands-on workshops for medical students and orthopedic residents

## Other materials needed

- Graft substitute: shoelace

- Fixation devices: transverse femoral pin [printed pin included / metal rod or Kirschner wire of x mm]; tibial fixation with interference screw or screw post (printable interference screw available in this series)

## Authors

- Edmar Stieven Filho – https://orcid.org/0000-0003-2869-4019

- Carolline Popovicz Nunes – https://orcid.org/0000-0002-9835-0185

Universidade Federal do Paraná (UFPR), Curitiba, Brazil

## Disclaimer

For educational and training purposes only. Not a medical device and not intended for clinical use.