Precise Repair of Complex Orbital Fractures (Pre-recorded Video)

盧葦 Wei LuChina Speaker Precise Repair of Complex Orbital FracturesZygomatic-orbito-maxillary fracture is a kind of complex orbital fracture with high morbidity, which can lead to severe physical dysfunction and deformity. The orbital mechanical environment has great influence on the fracture repair and reconstruction. If the internal fixation is not consistent with the mechanical environment after the reconstruction, it is easy to lead to complications such as poor fracture healing, implant deformation, malposition and even breakage, which not only bring trouble to patients, but also increase financial burden. This study developed finite element models of absorbable material and titanium material for repair and fixation, respectively. By applying a force of 120 N to the model to simulate the masseter muscle strength, the maximum stress and displacement of the repair materials and the fracture ends were measured. In discussing various models, the maximum stress values of absorbable and titanium materials are less than their yield strength, and the maximum displacement values of the titanium material and fracture end were less than 0.1 mm and 0.2 mm. The maximum displacement values of absorbable material and fracture end in incomplete zygomatic fracture and dislocation were less than 0.1 mm and 0.2 mm. While in the zygomatic complex complete fractures and dislocation, the maximum displacement values of the absorbable material and the fracture end exceeded 0.1 mm and 0.2 mm. In this study, the finite element biomechanical analysis method improved the operative success ratio of zygomatic-orbito-maxillary fracture and reduced postoperative complications, which provided a new research method and objective quantitative basis for the accurate treatment.