Experimental assessment of changes in bone fragment position using infraread diodes on saw bone models with a hexapod fixator

Background: The purpose of this study was an experimental assessment of changes in bone fragment position in patients with non-union of the tibia treated with a hexapod fixator. Hypothesis: We hypothesized that the use of hexapod fixators leads to differences between the planned and actual position of bone fragments. Methods: The study was conducted in physical models of the hexapod fixator–bone fragment system. Bone fragment displacement was measured using the Optotrak Certus Motion Capture System. We assessed differences between the planned and actual position of bone fragments. Results: Assessment of bone fragment compression demonstrated a difference between the target and actual correc…