Biomechanical properties of novel transpedicular transdiscal screw fixation with interbody arthrodesis technique in lumbar spine: A finite element study.

ABSTRACT:

Purpose

The purpose of this study was to investigate finite element biomechanical properties of the novel transpedicular transdiscal (TPTD) screw fixation with interbody arthrodesis technique in lumbar spine.

Methods

An L4-L5 finite element model was established and validated. Then, two fixation models, TPTD screw system and bilateral pedicle screw system (BPSS), were established on the validated L4-L5 finite element model. The inferior surface of the L5 vertebra was set immobilised, and moment of 7.5 Nm was applied on the L4 vertebra to test the range of motion (ROM) and stress at flexion, extension, lateral bending and axial rotation.

Results

The intact model was validated for prediction accuracy by comparing two previously published studies. Both of TPTD and BPSS f

SUBMITTER: Lv QB 

PROVIDER: S-EPMC6172361 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature