A combined device for repairing lumbar pars interarticularis fracture based on anatomical morphology

Abstract

This invention relates to a combined device for repairing lumbar spondylolysis based on anatomical morphology, comprising: a universal pedicle screw, the end of which is movably connected to a universal head; a bone plate assembly, which is movably connected to the universal pedicle screw; the bone plate assembly includes a fixation rod, a lamina bone plate, and a bend; the fixation rod is disposed in the universal head, the distal end of which extends out of the universal head, and the middle part of the fixation rod is rotatably connected to the universal head; the lamina bone plate is disposed at the end of the fixation rod, and the two are integrally formed; the bend is inclinedly disposed at the distal end of the lamina bone plate. The advantages of this invention are that the combined use of the universal pedicle screw and the bone plate assembly takes into account both the axial and sagittal tilt angles of the lumbar lamina, and is more closely fitted to the lamina where the spondylolysis is located compared with traditional hook-type spondylolysis repair devices, adapting to the complex three-dimensional anatomical morphology of the lumbar lamina, with high fixation strength and good fixation stability.

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