Finite element analysis of the lumbar spine in adolescent idiopathic scoliosis subjected to different loads

Zhang, Qiaolin; Chon, TeoEe; Zhang, Yan; Baker, Julien S.; Gu, Yaodong

doi:10.1016/j.compbiomed.2021.104745

Cited by 43 publications

(35 citation statements)

References 43 publications

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“…Secondly, this is a pilot study in terms of PFM, and thus many underlying injury mechanisms, and even the detailed description of postpartum lesions (e.g., tears or avulsions and its functional repercussions) were not explored and involved. Last but the most important, due to technical restriction, it is always difficult or even impossible to verify the simulation results of the inner body parts through in vitro experimental tests [30,31]. Thus, the simulation results of this study were compared and verified with previous relevant studies for the overall trend and magnitude [17,18,26,27].…”

Section: Discussionmentioning

confidence: 84%

A Simulation Analysis of Maternal Pelvic Floor Muscle

Xuan

Yang

Gao

et al. 2021

IJERPH

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Pelvic floor disorder (PFD) is a common disease affecting the quality of life of middle-aged and elderly women. Pelvic floor muscle (PFM) damage is related to delivery mode, fetal size, and parity. Spontaneous vaginal delivery causes especially great damage to PFM. The purpose of this study was to summarize the characteristics of PFM action during the second stage of labor by collecting female pelvic MRI (magnetic resonance imaging) data and, further, to try to investigate the potential pathogenetic mechanism of PFD. A three-dimensional model was established to study the influence factors and characteristics of PFM strength. In the second stage of labor, the mechanical responses, possible damage, and the key parts of postpartum lesions of PFM due to the different fetal biparietal diameter (BPD) sizes were analyzed by finite element simulations. The research results showed that the peak stress and strain of PFM appeared at one-half of the delivery period and at the attachment point of the pubococcygeus to the skeleton. In addition, during the simulation process, the pubococcygeus was stretched by about 1.2 times and the levator ani muscle was stretched by more than two-fold. There was also greater stress and strain in the middle area of the levator ani muscle and pubococcygeus. According to the statistics, either being too young or in old maternal age will increase the probability of postpartum PFM injury. During delivery, the entire PFM underwent the huge deformation, in which the levator ani muscle and the pubococcygeus were seriously stretched and the attachment point between the pubococcygeus and the skeleton were the places with the highest probability of postpartum lesions.

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Section: Discussionmentioning

confidence: 84%

A Simulation Analysis of Maternal Pelvic Floor Muscle

Xuan

Yang

Gao

et al. 2021

IJERPH

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“…Articles with a score of more than 85% are regarded good because they provide answer for all thirteen questions. These publications offered detailed information about their objectives, study design, key findings, and conclusion [ 1 , 3 , 9 ]. The remaining eleven studies fulfilled at minimum 70% to 90% of the questions [ 6 , 10 ]–[ 11 ].…”

Section: Resultsmentioning

confidence: 99%

“…The majority of the participants were young people, with only a few adults of average age. Nine studies involved adolescences (aged between 10 and 19) [ 1 , 3 , 9 , 11 , 12 , 14 , 15 , 17 ], two articles assessed middle-aged individuals (age range from 30–59) [ 10 , 19 ], and none of the articles involved elderly persons (aged 60 and above). The number of participants in the evaluated publications varied, with the highest number being 20 peoples and seven articles keeping one as patient data for their investigation [ 6 , 9 , 11 , 12 , 16 , 18 , 19 ].…”

Section: Resultsmentioning

confidence: 99%

Corrective Mechanism Aftermath Surgical Treatment of Spine Deformity due to Scoliosis: A Systematic Review of Finite Element Studies

Gunasekaran

Basaruddin

Muhayudin

et al. 2022

BioMed Research International

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This paper presents a systematic study in reviewing the application of finite element method for the analysis of correction mechanism of spine deformity due to scoliosis. The study is aimed at systematically (1) reviewing the use of finite element analysis in spine deformity case, (2) reviewing the modelling of pedicle screw and rod system in scoliosis surgery, and (3) analysing and discussing gap between the studies. Using the restricted key phrases, the review gathered studies from 2001 to 2021 from various electronic databases (Scopus, ScienceDirect, PubMed, Medline, and WorldCAT). Studies were included if they reported a finite element study on spine deformity. Studies that did not fully disclose their methodology and results had significant discrepancies, not published in English or not yet published were all disqualified. Regardless of inconsistencies in the methodological design of the studies, the quality of all papers was above the acceptable level. A total of fifteen manuscripts were considered for inclusion and were given a comprehensive review. This study indicates that analysing the forces acting on the spine, as well as the interrelationship between the force, stress, and degree of correction (which measured as the Cobb angle), could help to improve the corrective mechanism procedure of spine deformity. Pedicle screws and its placement strategies are also important as it influence the corrective forces for scoliosis treatment. Hence, the findings of this study could potentially be used as a guidance to develop a reliable finite element analysis that can predict the biomechanics responses during the corrective spine deformity treatment.

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“…In the past, the curative effect evaluation of orthopedic surgery was based on the improvement of clinical symptoms, ignoring the mechanical analysis. The FE analysis method uses the approximate mathematical method to divide the physical system into many small elements for simulation, which can simulate and calculate the structures with complex geometric shapes and material properties [ 34 ]. The FE method has a powerful modeling function, and it can simulate objects with complex geometric shapes, material parameters, and different stress conditions under static and dynamic conditions [ 35 ].…”

Section: Discussionmentioning

confidence: 99%

Effect of Displacement Degree of Distal Chevron Osteotomy on Metatarsal Stress: A Finite Element Method

Zhang

Huang

et al. 2022

Biology

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Background: The stress of foot bone can effectively evaluate the functional damage caused by foot deformity and the results of operation. In this study, the finite element method was used to investigate the degree of displacement of distal chevron osteotomy on metatarsal stress and metatarsophalangeal joint load; Methods: Four finite element models of displacement were established by using the CT images of a patient with moderate hallux valgus (hallux valgus angle and intermetatarsal angle were 26.74° and 14.09°, respectively), and the validity of the model was verified. Each finite element model consisted of bones and various cartilage structures, ligaments, and plantar fascia, as well as encapsulated soft tissue. Except for soft tissue, the material properties of other parts were isotropic linear elastic material, and the encapsulated soft tissue was set as nonlinear hyperelastic material. The mesh was tetrahedral mesh. Link elements were used in ligament and plantar fascia. A ground reaction force with a half-body weight was applied at the bottom of the floor to simulate the ground reaction when standing. The upper surfaces of the encapsulated soft tissue, distal tibia, and distal fibula were fixed. The stress distribution of metatarsals and the stress of cartilage of the first metatarsophalangeal joint were compared and analyzed; Results: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance; Conclusions: Compared with the hallux valgus without osteotomy, the stress of the first metatarsals and second metatarsals of 2–4 mm decreased, and the stress of the interarticular cartilage of the first metatarsophalangeal joint with 4 mm was reduced. In the case of 6 mm, the stress value between the first metatarsal and the first metatarsophalangeal joint increased, and 4 mm was the most suitable distance. For the degree of displacement of the distal chevron osteotomy, the postoperative stability and the stress distribution of metatarsal bone should be considered. Factors such as hallux valgus angle, intermetatarsal angle, patient’s age, body weight, and metatarsal width should be considered comprehensively. The factors affecting osteotomy need to be further explored. The degree of displacement of osteotomy can be evaluated by FE method before the operation, and the most suitable distance can be obtained.

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Finite element analysis of the lumbar spine in adolescent idiopathic scoliosis subjected to different loads

Cited by 43 publications

References 43 publications

A Simulation Analysis of Maternal Pelvic Floor Muscle

A Simulation Analysis of Maternal Pelvic Floor Muscle

Corrective Mechanism Aftermath Surgical Treatment of Spine Deformity due to Scoliosis: A Systematic Review of Finite Element Studies

Effect of Displacement Degree of Distal Chevron Osteotomy on Metatarsal Stress: A Finite Element Method

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