Computer-rapid molding-assisted simulation of hollow screw for femoral neck fracture / 国际外科学杂志

ABSTRACT

Objective:The application of computer-rapid prototyping-assisted simulated hollow screw in the treatment of femoral neck fractures in fresh cadavers verified the reliability and accuracy of computer-rapid prototyping-assisted simulated hollow screw in the treatment of femoral neck fractures.Methods:The glass ion was labeled as a target for the treatment of femoral neck fracture with a cannulated screw. Three Kirschner pins were placed at the top and bottom of the greater trochanter. CT scan of the processed specimens. The scan data was imported into Mimics software, and the upper end of the femur was reconstructed three-dimensionally and the target of the femoral neck fracture was fixed with cannulated screws. The position of the cannulated screw in the femoral neck was designed. In Pro/E software, draw a guide that fits the three positioning Kirschner pins and cannulated screw guide needles on the upper end of the femur, and use rapid prototyping technology to make the guide. The navigation template was mounted on the positioning pin through the cannulated screw guiding hole, and the hollow screw guiding needle was drilled, and the hollow screw was inserted for the treatment of the femoral neck fracture to complete the positioning and guiding. According to the coordinates of the hollow screw guide needle and the target center in the Mimics software three-dimensional reconstruction coordinate system, the spatial distance calculation formula is used to calculate the distance between the hollow screw guide needle and the target center.Results:The coordinate analysis of the end point of the cannulated screw guide needle and the target can be obtained that the average distance between the end point of the cannulated screw guide needle for fixed femoral neck fracture and the target center point was 1.92 mm.Conclusion:The computer-rapid molding-assisted cannulated screw fixation of the femoral neck fracture is reliable and accurate, which provides a new idea and method for clinical individualization and precise fixation of the femoral neck fracture.