The flexion–extension response of a novel lumbar intervertebral disc prosthesis: A finite element study

Vacas, Francisco García; Juanco, Francisco Ezquerro; Blanca, Ana Pérez de la; Prado-Nóvoa, María; Pozo, Sergio Postigo

doi:10.1016/j.mechmachtheory.2013.11.013

Cited by 6 publications

(1 citation statement)

References 31 publications

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“…These models can be divided into two groups: Finite element models (FEM) and multibody models (MBS). The FEM provide very accurate results, useful when assessing the stress-strain state of the joint [3,4], and can also be used to design artificial discs [5,6,7]. Nevertheless, due to high computational load, the FEM is usually applied to structures with limited mobility.…”

Section: Introductionmentioning

confidence: 99%

Structural and Material Optimization for Automatic Synthesis of Spine-Segment Mechanisms for Humanoid Robots with Custom Stiffness Profiles

Ciszkiewicz

Milewski

2019

Materials

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Typical artificial joints for humanoid robots use actual human body joints only as an inspiration. The load responses of these structures rarely match those of the corresponding joints, which is important when applying the robots in environments tailored to humans. In this study, we proposed a novel, automated method for designing substitutes for a human intervertebral joint. The substitutes were considered as two platforms, connected by a set of flexible links. Their structural and material parameters were obtained through optimization with a structured Genetic Algorithm, based on the reference angular stiffnesses. The proposed approach was tested in three numerical scenarios. In the first test, a mechanism with angular stiffnesses corresponded to the actual L4–L5 intervertebral joint. Scenarios 2 and 3 featured mechanisms with geometry and structure comparable to the joint, but with custom stiffness profiles. The obtained results proved the effectiveness of the proposed method. It could be employed in the design of artificial joints for humanoid robots and orthotic structures for the human spine. As the approach is general, it could also be extended to different body joints.

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Section: Introductionmentioning

confidence: 99%

Structural and Material Optimization for Automatic Synthesis of Spine-Segment Mechanisms for Humanoid Robots with Custom Stiffness Profiles

Ciszkiewicz

Milewski

2019

Materials

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Using the Finite Element Method to Determine the Influence of Age, Height and Weight on the Vertebrae and Ligaments of the Human Spine

Somovilla-Gómez

Lostado-Lorza

Bobadilla

et al. 2016

Lecture Notes in Mechanical Engineering

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Spine

Laporte¹,

Abbeele²,

Rohan³

et al. 2017

Biomechanics of Living Organs

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Clinical problems of the human spine have a high prevalence, affecting more than 25.5 M persons 2012. Older adults, in particular, form a continuously growing age group, with degenerative spine disorders such as deformities or osteoporosis. A basic requirement for proper management of various spinal disorders, effective injury prevention and rehabilitation is a detailed knowledge of the fundamental biomechanics of the spine. Despite the growing interest for biomechanical research on the spine during the last decades however, many clinical problems remain largely unsolved due to the poor understanding of the underlying degeneration phenomena and the complexity of the spinal construct. In particular, diagnosis is challenging, because of the lack of tools to quantitatively assess soft tissue alteration and because the most relevant clinical indices for diagnosis are not clearly established. Driven by the ever-growing computer power and imaging devices, the development of FE models has become widespread and have allowed to overcome some of the existing shortcomings (invasiveness, complexity of the organization of the biological tissues and complexity of establishing the loads present in the human spine). These have thus emerged as powerful and reliable tools with considerable applications in surgery planning, in studying the etiology, progression and effects of spinal deformities and intervertebral disc. These models have enhanced our understanding of the spine and will continue to do so in the future. In our group, numerical work performed using of a FE modeling has highlighted the paramount influence of both geometric patient-specific modeling and in-vivo personalization of tissue mechanical properties. There are many exciting avenues for future research. Amongst these, the question of the validation of computational modeling and simulation with the perspective of supporting the development of medical devices is central.

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The flexion–extension response of a novel lumbar intervertebral disc prosthesis: A finite element study

Cited by 6 publications

References 31 publications

Structural and Material Optimization for Automatic Synthesis of Spine-Segment Mechanisms for Humanoid Robots with Custom Stiffness Profiles

Structural and Material Optimization for Automatic Synthesis of Spine-Segment Mechanisms for Humanoid Robots with Custom Stiffness Profiles

Using the Finite Element Method to Determine the Influence of Age, Height and Weight on the Vertebrae and Ligaments of the Human Spine

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