Three-Dimensional Printing Guided for Double Meniscal Allograft Transplantation.

In complex cases of meniscus allograft transplantation, such as in double transplants, and when they are combined with ligament reconstructions, there is a high risk of tunnel overlap, which may compromise graft integrity and lead to treatment failure. Additionally, matching the meniscal allograft size to the patient's knee anatomy is critical and challenging. To address these challenges, a preoperative protocol was developed using three-dimensional (3D) printing. First, tomography of the knee is used to make a 3D model of the proximal tibia. This model is printed in real size and is used for allograft selection. The surgical team uses the model to determine the drilling parameters of the tunnels for the double meniscus allograft transplantation and anterior cruciate ligament reconstruction, ensuring that no overlap occurs. Finally, the 3D model serves as a guide during surgery for accurate tunnel and graft placement. The 3D model provides a versatile tool for planning meniscal transplants, especially in revision surgeries or complex cases, improving preoperative visualization and surgical precision. This technique can ensure optimal graft selection, facilitate precise replication of the drilling parameters, and enhance surgical outcomes.