Knee Model with Pre-made Tunnels for ACL Reconstruction – Outside-In Technique (Surgical Training)

## What is this?

A 3D-printable knee model (distal femur and proximal tibia) with pre-made bone tunnels reproducing the outside-in technique for anterior cruciate ligament (ACL) reconstruction. In the outside-in technique, the femoral tunnel is drilled from the lateral femoral cortex toward the intra-articular footprint, independently of the tibial tunnel.

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 tunnel placement and orientation in outside-in ACL reconstruction

- Practicing graft passage and fixation outside the operating room

- Comparing tunnel positions with other ACL techniques in the same series (e.g., transtibial)

- Hands-on workshops for medical students and orthopedic residents

## Other materials needed

- Graft substitute: shoelace

- Fixation devices: interference screw and/or cortical suspension button (printable versions 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.