PSI applications of knee surgery in sports medicine

High Tibial Osteotomy (HTO) is a widely accepted surgical procedure for medial osteoarthritis of the knee by correcting the mechanical axis of the lower limb. In certain scenarios, intentional sagittal adjustment during HTO becomes necessary, such as procurvatum or recurvatum deformities, ligament instability or reconstruction, or limited range of motion.

Traditional methods for achieving biplanar correction (in both the coronal and sagittal planes) often lead to complications, including lateral hinge fractures and inaccurate correction across both planes. Moreover, when ligament reconstruction is engaged in the osteotomy procedure, it typically introduces technical challenges, such as interference between the ligament tunnel and screws.

3D-printed Patient-specific Instruments (PSI) have emerged as a promising and well-established technology in various orthopedic surgeries. Through 3D preoperative planning, it becomes possible to precisely determine osteotomy parameters, ligament tunnel placement, and the positioning of plates and screws, all without interference.

Leveraging the power of PSI technology, we present cases that adopt the concept of oblique plane deformity to achieve accurate biplanar correction in knee osteotomies and integrate with ligament reconstruction. This approach represents a significant advancement in the field of knee surgeries in sports medicine.