Determination of Elastic Modulus and Preparation Method of Personalized Posterior Pedicle Screw System

Abstract

The invention discloses an elasticity modulus determination method and a preparation method of an individual posterior spinal pedicle screw rod system. The elasticity modulus determination method comprises the steps that CT scanning is performed on a target spine, and a three-dimensional model is rebuilt; material properties are supplied, a finite element analysis model of the target spine is built, and an elasticity modulus gradient distribution law of the target spine is obtained through analysis; the elasticity modulus of the pedicle screw rod system is obtained for the assembly relationship between the target spine and the pedicle screw rod system by combining the elasticity modulus gradient distribution law of the target spine and adopting an interpolation method. The preparation method comprises the steps that the pedicle screw rod system of which the elasticity modulus meets the requirement is prepared by adopting a metal sintering technique. The pedicle screw rod system is well matched with the biomechanical property of the individual spine, pedicle screw and rod stress distribution is more uniform and reasonable, the fixing requirement is better met, and a scientific basis can be supplied to next research and development of a novel material, optimization design of surgical methods and surgical instruments and building of a relevant database.

Description

technical field [0001] The invention specifically relates to a method for determining and preparing the elastic modulus of a personalized posterior spinal pedicle screw-rod system. Background technique [0002] Posterior pedicle screw fixation of the spine can provide strong and reliable support for the spine (especially the posterior column), and is beneficial to the bony fusion of the spine. It is widely used in the treatment of spinal trauma, deformity, and degeneration. A good pedicle screw-rod system internal fixation implant should meet the following conditions: ①good biocompatibility; ②high enough strength and stable fixation; ③as few complications as possible and can promote intervertebral Healing requires not only reliable fixation in fracture treatment, but also reducing shear stress and stress shielding between vertebral bodies, which is conducive to early functional exercise and promotes intervertebral bone healing. Stress shielding provides stable fixation in t...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: aiming at the technical problem that the existing spinal posterior pedicle screw rod internal fixation system does not match the elastic modulus of the spine in different segments of the human body, to provide a spinal cord that is well matched with the biomechanical characteristics of the individual spine, The stress distribution of pedicle screws and rods is more uniform and reasonable, which is more in line with the fixing requirements, and can provide scientific basis for the next step of research and development of new materials, optimization design of surgical methods and surgical instruments, and establishment of relevant databases. Personalized posterior pedicle screws Elastic Modulus Determination and Preparation Method of Rod System

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