Comparative Study of Biomechanical Model of the L4-L5 Lumbar Section with Mechanical Fixation

被引：0

作者：

Osquel Perez-Rivero, Eduardo ^{[1
]}

Alfonso Gonzalez-Carbonell, Raide ^{[1
]}

Ortiz-Prado, Armando ^{[2
]}

Hugo Jacobo-Armendariz, Victor ^{[2
]}

机构：

[1] Univ Camaguey, Mech Engn, Camaguey, Cuba

[2] Univ Nacl Autonoma Mexico, UDIATEM, Coyoacan, DF, Mexico

来源：

VIII LATIN AMERICAN CONFERENCE ON BIOMEDICAL ENGINEERING AND XLII NATIONAL CONFERENCE ON BIOMEDICAL ENGINEERING | 2020年 / 75卷

关键词：

L4-L5 lumbar section; Biomechanics; Mechanical fixation; INTERBODY FUSION; FINITE-ELEMENT;

D O I：

10.1007/978-3-030-30648-9_110

中图分类号：

R318 [生物医学工程];

学科分类号：

0831 ;

摘要：

The risk of fixation loosening by the pedicle failure during or after the screw insertion surgery is high, causing fracture of the bone tissue due to the high stress concentration. The purpose of this paper is study the influence of osteoporosis on the bone-screw interface, based on a 3D biomechanical model of the lumbar section. The Finite Element (FE) method was used. Mechanical properties in health vertebra (HV) and osteoporotic vertebra (OV) were defined. A compression load of 500 N and a moment of 7.5 Nm were assumed in four load scenarios: compression, flexion, flexion-extension and axial rotation. The bone-screw interaction zone and the posterior of vertebra and pedicles were susceptible to bone tissue failure, because the higher equivalent stress were close to bone failure stress. The HV stresses were higher than OV stresses. The higher stress was 8.83 MPa. Opposite to stresses results, the strains were higher in OV than in HV, being the OV strain more than 2 times higher than HV strain.

引用

页码：841 / 849

页数：9

共 19 条

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