Gao Yuan stood in front of the joint simulator, holding the control handle, his eyes fixed on the screen, his entire body like a statue, with only his fingertips moving slightly.
On the screen was a virtual knee joint, with three-dimensional reconstructed anatomical structures vividly displayed: meniscus tear, anterior cruciate ligament rupture, typical athlete injuries. His wrist gently rotated, the arthroscope roamed in the virtual joint cavity like a flexible fish, entering the intercondylar notch, sweeping past the femoral condyle, precisely reaching the posterior angle of the meniscus. The simulator's feedback was realistic and delicate; he could "feel" the subtle elasticity when the probe touched the cartilage, a sign of healthy tissue—when it becomes brittle or hard, it indicates cartilage degeneration. This tactile sensation was engraved into his nerve memory over twenty years.
