BIOMECHANICAL STUDY ON THE EFFECTS OF VARUS AND VALGUS DEFORMITIES OF THE KNEE ON THE WEIGHT-BEARING DOME OF ACETABULUM

This study's purpose was to investigate the biomechanical effects of varus and valgus knee deformities in different degrees on the acetabulum's weight-bearing dome. We collected six lower extremity specimens from three fresh adult male cadavers, including the L5 vertebral body, pelvis, bilateral hips, bilateral knees and lower leg sections. We visually examined all specimens and then X-rayed them to exclude the presence of hip and knee pathology. We adjusted the tibiofemoral angle to 180° (knee varus at 10°, Group A), 190° (knee varus at 20°, Group B), 160° (knee valgus at 10°, Group C) and 150° (knee valgus at 20°, Group D) using the external fixator, respectively, fixed them, respectively, and then monitored them through the above 3D laser scanning imager. We found the acetabulum's weight-bearing dome area, stress and stress distribution by loading and coloring on the pressure-sensitive film. We measured them using a FPD-305 density meter and FPD-306 pressure converter. We compared the areas, average st...