Biomechanical evaluation of autologous bone-cage in posterior lumbar interbody fusion: a finite element analysis

Zhu, Haodong; Zhong, Wei; Zhang, Ping; Liu, Xiaoming; Huang, Jun-Ming; Liu, Fatai; Li, Jian

doi:10.1186/s12891-020-03411-1

Cited by 15 publications

(11 citation statements)

References 24 publications

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“…Material properties were described the as previously reported and are shown in Table 2 . 18 , 19 , 20 …”

Section: Methodsmentioning

confidence: 99%

Biomechanical Evaluation of Spinal Column after Percutaneous Cement Discoplasty: A Finite Element Analysis

Liu

et al. 2022

Orthopaedic Surgery

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Objective To compare the biomechanical properties of percutaneous cement discoplasty (PCD) in the spinal column between different implant‐endplate friction. Methods A validated L3‐Scarumfinite element (FE) model was modified for simulation. In the PCD model, the L4/5 level was modified based on model 1 (M1) and model 2 (M2). In M1, the interaction between bone cement and endplate was defined as face‐to‐face contact with a friction coefficient of 0.3; in M2, the contact was defined as a Tie constraint. 7.5 N m moments of four physiological motions and axial load of 15, 100 and 400 N preload were imposed at the top of L3. The range of motion (ROM) and interface stress analysis of endplates, annulus fibrosus and bone cement of the operated level were calculated for comparisons among the three models. Results The ROM of M1 and M2 increased when compared with the intact model during flexion (FL) (17.5% vs 10.0%), extension (EX) (8.8% vs −8.8%), left bending (LB) (19.0% vs −17.2%) and left axial rotation (LR) (34.6% vs −3.8%). The stress of annulus fibrosus in M1 and M2 decreased in FL (−48.4% vs −57.5%), EX (−25.7% vs −14.7%), LB (−47.5% vs −52.4%), LR (−61.4% vs −68.7%) and axis loading of 100 N (−41.5% vs −15.3%), and 400 N (−27.9% vs −27.3%). The stress of upper endplate of M1 and M2 increased in FL (24.6% vs 24.7%), LB (82.2% vs 89.5%), LR (119% vs 62.4%) and axis loading of 100 N (64.6% vs 45.5%), and 400 N (58.2% vs 24.3%), but was similar in EX (2.9% vs 0.3%). The stress of lower endplate of M1 and M2 increased in FL (170.9% vs 175.0%), EX (180.8% vs 207.7%), LB (302.6% vs 274.7%), LR (332.4% vs 132.8%) and axis loading of 100 N (350.7% vs 168.6%), and 400 N (165.2% vs 106.7%). Conclusion Percutaneous cement discoplasty procedure could make effect on the mobility or stiffness. The fusion of bone cement and endplate might have more biomechanical advantages, including of the decreasing rate of implant subsidence and dislocation, and the increase spine stability.

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“…Material properties were described the as previously reported and are shown in Table 2 . 18 , 19 , 20 …”

Section: Methodsmentioning

confidence: 99%

Biomechanical Evaluation of Spinal Column after Percutaneous Cement Discoplasty: A Finite Element Analysis

Liu

et al. 2022

Orthopaedic Surgery

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“…The Young's modulus was set to 16.4 GPa and 155 MPa for the cortical and cancellous bone analogues, respectively, and a Poisson's ratio of 0.3 was set for both materials. For the spinal cage, the material properties of PEEK with Young's modulus of 3500 MPa and Poisson's ratio 0.45 were employed [11,13].…”

Section: Assignment Of Materials Propertiesmentioning

confidence: 99%

Finite element analysis and clinical efficacy of hyperextension bicondylar tibial plateau fractures fixed by medial and lateral dual plates and spinal cage

Huang

et al. 2023

Preprint

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Purpose To elucidate the biomechanical characteristics of fracture defect filled with spinal cage by finite element analysis, and investigate the clinical efficacy of medial and lateral dual plates with spinal cage for the treatment of hyperextension bicondylar tibial plateau fractures. Methods A 10-mm cuneiform defective osteotomy of proximal tibia was created in the finite element model to simulate hyperextension bicondylar tibial plateau fractures. The defect area in the established model was filled with spinal cage (Group A) or allograft bones (Group B) after fracture reduction. The biomechanical properties of both models were tested under axial compression loading and the maximum displacement of the fragments was recorded. Furthermore, a retrospective analysis was conducted on 12 patients with hyperextension bicondylar tibial plateau fractures who were surgically treated at the Lower Limb Surgery Ward of Traumatic Orthopedic Department, Xi’an Honghui Hospital from January 2020 to January 2022. The gender, age, cause of injury, associated injury, the preoperative and postoperative posterior tibial slope angle (pTSA), duration between injury and operation, surgical duration, intraoperative blood loss, complications, time of bone healing, time of weight bearing, Rasmussen radiological criteria and HSS scores were collected and analyzed. Results The finite element model showed that the maximum displacement in Group A was 0.1006 mm and that in Group B was 0.1203 mm, whereas the maximum stress in the two groups were 39.70 MPa and 43.69 MPa respectively. Therefore, implantation of spinal cage into the bone defect area after fracture reduction has obvious biomechanical advantages. We also analyzed 12 patients (9 males and 3 females, aged ranging from 27 to 66 years with mean age of 46.0 ± 12.3 years) with Schatzker type VI fractures. The patients were successfully followed up for an average of 12.50 ± 3.37 months (8 to 18 months). The postoperative pTSA was significantly improved related to the preoperative pTSA (P < 0.001). The average duration between injury and operation was 6.08 ± 2.78 days, the average surgical duration was 131.67 ± 32.71 min, and the average intraoperative blood loss was 320.83 ± 113.73ml. Furthermore, the average time of bone healing was 13.58 ± 2.57 weeks and the average time of weight-bearing was 8.33 ± 2.93 weeks. In addition, 33.33% of postoperative complications was observed in 1 case of superficial wound infection and dehiscence, 1 case of delayed union combined with limited range of motion of the knee joint and 2 cases of deep vein thrombosis. The excellent and good rates of Rasmussen radiological criteria and HSS scores were 83.33% and 91.67% respectively. Conclusion Fracture reduction and fixation by medial and lateral dual plates and spinal cage is an effective method for the treatment of hyperextension bicondylar tibial plateau fractures, and has biomechanical advantages such as favorable bone healing time, weight bearing time, radiographic and clinical functional outcomes.

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“…( 2017 ) Frictionless Zhu et al. ( 2020 ) Friction coefficient of 0.1 Zhang et al. ( 2018 ) Frictionless Zhu et al.…”

Section: Validation Processes Used In Facet Joints Biomechanicsmentioning

confidence: 99%

Biomechanical modelling of the facet joints: a review of methods and validation processes in finite element analysis

Mengoni

2020

Biomech Model Mechanobiol

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There is an increased interest in studying the biomechanics of the facet joints. For in silico studies, it is therefore important to understand the level of reliability of models for outputs of interest related to the facet joints. In this work, a systematic review of finite element models of multi-level spinal section with facet joints output of interest was performed. The review focused on the methodology used to model the facet joints and its associated validation. From the 110 papers analysed, 18 presented some validation of the facet joints outputs. Validation was done by comparing outputs to literature data, either computational or experimental values; with the major drawback that, when comparing to computational values, the baseline data was rarely validated. Analysis of the modelling methodology showed that there seems to be a compromise made between accuracy of the geometry and nonlinearity of the cartilage behaviour in compression. Most models either used a soft contact representation of the cartilage layer at the joint or included a cartilage layer which was linear elastic. Most concerning, soft contact models usually did not contain much information on the pressure-overclosure law. This review shows that to increase the reliability of in silico model of the spine for facet joints outputs, more needs to be done regarding the description of the methods used to model the facet joints, and the validation for specific outputs of interest needs to be more thorough, with recommendation to systematically share input and output data of validation studies.

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Biomechanical evaluation of autologous bone-cage in posterior lumbar interbody fusion: a finite element analysis

Cited by 15 publications

References 24 publications

Biomechanical Evaluation of Spinal Column after Percutaneous Cement Discoplasty: A Finite Element Analysis

Biomechanical Evaluation of Spinal Column after Percutaneous Cement Discoplasty: A Finite Element Analysis

Finite element analysis and clinical efficacy of hyperextension bicondylar tibial plateau fractures fixed by medial and lateral dual plates and spinal cage

Biomechanical modelling of the facet joints: a review of methods and validation processes in finite element analysis

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