Simulation method and system of lumbar spondylolysis screw vertebral plate hook internal fixation system

Abstract

The invention provides a simulation method and system for a lumbar spondylolysis screw vertebral plate hook internal fixation system. The simulation method comprises the following steps: acquiring image data from the lumbar vertebra to the sacral vertebrae; segmenting and reconstructing the acquired image data to obtain a vertebral body three-dimensional model accompanied with lumbar spondylolysis; the three-dimensional model of the vertebral body is preprocessed; performing reverse materialization processing on the preprocessed cone three-dimensional model to obtain a cone curved surface model; according to the obtained vertebral body curved surface model, adding and assembling components of the lumbar spondylolysis screw vertebral plate hook internal fixation system to obtain an assembled curved surface model; performing grid division on each part to obtain a three-dimensional body grid of each part; carrying out material attribute assignment on the three-dimensional body mesh of the cone model by adopting an empirical formula; performing finite element analysis on the three-dimensional body mesh after material attribute assignment to obtain a simulation result; according to the invention, based on finite element analysis, more accurate analogue simulation of the lumbar spondylolysis screw vertebral plate hook internal fixation system is realized.

Description

technical field [0001] The invention relates to the technical field of orthopedic spine simulation, in particular to a simulation method and system for a lumbar isthmus screw lamina hook internal fixation system. Background technique [0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art. [0003] Lumbar spondylolysis is a common spinal disorder in clinical practice, and it has a high incidence rate among adolescents and athletes. The clinical manifestation is the bone defect or discontinuity in the isthmus of the spondylois between the upper and lower articular processes on one or both sides of the lumbar spine, which is common in the L4-L5 segment of the lumbar spine, and most of them are bilateral isthmic fissures. Symptoms of patients usually manifest as low back pain, nerve numbness, etc. If not treated in time, it may develop into more serious diseases such as spondylolisthesis...

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Problems solved by technology

[0004] The inventor found that the clinical research index results show that the screw-laminar-hook internal fixation system has strong spinal stability and high bone graft fusion rate, but its mechanical properties cannot be explored; and most of the current research on the screw-laminar-hook internal fixation system is traditional mechanical In vitro experiments, although the research results are closer, but lack of in vivo biological changes, experimental conditions interfere with the results, experimental specimens are expensive and difficult to obtain, and there is no comparison of different internal fixation methods

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