scholarly journals Effect of finite element model loading condition on fracture risk assessment in men and women: The AGES-Reykjavik study

Bone ◽  
2013 ◽  
Vol 57 (1) ◽  
pp. 18-29 ◽  
Author(s):  
J.H. Keyak ◽  
S. Sigurdsson ◽  
G.S. Karlsdottir ◽  
D. Oskarsdottir ◽  
A. Sigmarsdottir ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Finite Element ◽  
Finite Element Model ◽  
Fracture Risk ◽  
Loading Condition ◽  
Element Model ◽  
Fracture Risk Assessment ◽  
Men And Women

Fracture risk assessment in metastatic femurs: a patient-specific CT-based finite-element approach

Meccanica ◽  
2019 ◽  
Vol 55 (4) ◽  
pp. 861-881 ◽  
Author(s):  
Cristina Falcinelli ◽  
Alberto Di Martino ◽  
Alessio Gizzi ◽  
Giuseppe Vairo ◽  
Vincenzo Denaro
Keyword(s):  
Risk Assessment ◽  
Finite Element ◽  
Fracture Risk ◽  
Fracture Risk Assessment ◽  
Patient Specific ◽  
Finite Element Approach ◽  
Element Approach

Stability of Isthmic Spondylolisthesis: Finite Element Model Study

2000 ◽  
Author(s):  
R. N. Natarajan ◽  
R. B. Garretson ◽  
H. An ◽  
G. B. J. Andersson
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Loading Condition ◽  
Element Model ◽  
Isthmic Spondylolisthesis ◽  
Model Study ◽  
Pars Interarticularis ◽  
Loading Modes ◽  
Moment Load ◽  
Developmental Condition

Abstract Spondylolysis is a developmental condition or a stress fracture phenomenon, in which a defect in the pars interarticularis leads to varying degrees of instability in the lumbar spine. A finite element model was used to study the effect of pars defect as well as pars defect combined with varying slip on the change in flexibility of the lumbar motion segments under mechanical loading. Compared to the intact model, a pars defect at L3–L4 level allowed a small increase in motion at L2 with respect to L5 under all loading modes except torsion. Motion of L2 with respect to L5 was further increased by 3% to 20% with 50% translation prior to loading in all loading modes except torsion. Fifty percent translation increased the torsion motion further by 50%. In every model, the increase in motion was greatest under torsion. This study showed that stability of a motion segment in spondylolysis depends on the amount of spondylolisthesis and the loading condition. There was more motion with increased slip in all-loading modes with largest increase with torsion moment load. The type of loading also affects the degree of motion, with torsion creating significant instability.

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