Biomechanical Analysis of Posterior Ligaments of Cervical Spine and Laminoplasty

Nishida, Norihiro; Mumtaz, Muzammil; Tripathi, Sudharshan; Kelkar, Amey; Sakai, Takashi; Goel, Vijay K.

doi:10.3390/app11167645

Cited by 13 publications

(7 citation statements)

References 49 publications

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“…In this study, when taking three steps up, the moment when the athlete swings the leg to the highest center of gravity in the third step was taken as the starting moment, and the moment when the take-off leg kicked off the ground was taken as the end point, and the process was defined as the take-off stage. e single-leg support stage is from the starting time to the time when the take-off leg touches the ground, the double-foot support stage is from the time when the take-off leg touches the ground to the time when the swing leg leaves the ground, and the single-leg stretch stage is from the time when the swing leg leaves the ground to the time when the take-off leg leaves the ground [20].…”

Section: Division Of Action Stagesmentioning

confidence: 99%

The Biomechanical Analysis of Jumping Difficulty Movement in National Traditional Sports

Zhang

Yang²

2022

Mobile Information Systems

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In order to explore the relevant factors and the completion of difficult movements, this paper is an important theoretical basis for improving and constructing the evaluation of athletes’ movement quality. It presents a kinematic analysis of the difficult movements of competitive Tai Chi, taking the difficult movements of the swirl group of competitive aerobics as the research object. The data is collected by different methods. When completing difficult movements, due to different personal exercise habits, this paper takes the right leg as the swinging leg and the left leg as the take-off leg when completing the difficult movements. The test object in this paper adopts the traditional three-step up-step method. The starting time of the take-off stage is consistent with the illustration. By consulting experts for the stage division of the difficult movement, the two movement stages are equally divided into three stages according to the needs of the research: take-off, soaring, and landing. The results show that, from the moment the left foot hits the ground to the moment of maximum cushioning, the angles of the right knee are 176.48° and 165.06°, respectively, and the flexion of the right knee is not large; especially when the left foot touches the ground, the right leg is close to a straight line, indicating that the athlete’s body is in a straight line. The posture is relatively good, the left foot is used as the grounding leg, the angle of the knee joint is reduced from 160.82° to 124.41°, and the left knee buffer angle is 36.40°. As the right leg swings to the ground, the left knee and left hip are slightly stretched, and the right knee and right hip are slightly flexed. This change is also reflected in the fact that the center of gravity changes from the direction of the horizontal speed at this stage. Move the left side of the body slightly to the right. Difficulty movements are different in the landing stage, and their joint parameters are also different. When the landing leg touches the ground, there is no significant difference in the maximum cushioning time, the degree of torsion of the shoulder and the hip is different, the relative rotation position of the shoulder and the hip is opposite, and the posture of the shoulders at the time of landing is different. In teaching, the landing leg and the end direction of the rotation are not the same; it is necessary to strengthen the strength training of the legs, to experience the force feeling of the different degrees of rotation of the shoulder joint and the hip joint, as well as the spatial perception ability, and take the initiative to actively land. The magnitude of the rear cushion and the coordination of the trunk and the limbs are used to avoid unnecessary damage during the landing phase.

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Section: Division Of Action Stagesmentioning

confidence: 99%

The Biomechanical Analysis of Jumping Difficulty Movement in National Traditional Sports

Zhang

Yang²

2022

Mobile Information Systems

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“…The meshed vertebrae and intervertebral discs were exported to ABAQUS software (ABAQUS ® , Version 6.10-2; Abaqus, Inc., Providence, RI, USA) for FE analysis. To model the behavior of ligaments, 3D truss elements in Abaqus software were used to simulate the nonlinear behavior of ligaments under tensile forces [ 17 , 18 ]. The 3D tension-only truss elements were used to model the five cervical ligaments, i.e., the anterior longitudinal ligament (ALL), the posterior longitudinal ligament (PLL), the capsular ligament (CL), the ligamentum flavum (LF), and the interspinous ligament (ISL).…”

Section: Methodsmentioning

confidence: 99%

Investigation into Cervical Spine Biomechanics Following Single, Multilevel and Hybrid Disc Replacement Surgery with Dynamic Cervical Implant and Fusion: A Finite Element Study

2022

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Cervical fusion has been a standard procedure for treating abnormalities associated with the cervical spine. However, the reliability of anterior cervical discectomy and fusion (ACDF) has become arguable due to its adverse effects on the biomechanics of adjacent segments. One of the drawbacks associated with ACDF is adjacent segment degeneration (ASD), which has served as the base for the development of dynamic stabilization systems (DSS) and total disc replacement (TDR) devices for cervical spine. However, the hybrid surgical technique has also gained popularity recently, but its effect on the biomechanics of cervical spine is not well researched. Thus, the objective of this FE study was to draw a comparison among single-level, bi-level, and hybrid surgery with dynamic cervical implants (DCIs) with traditional fusion. Reductions in the range of motion (ROM) for all the implanted models were observed for all the motions except extension, compared to for the intact model. The maximum increase in the ROM of 42% was observed at segments C5–C6 in the hybrid DCI model. The maximum increase in the adjacent segment’s ROM of 8.7% was observed in the multilevel fusion model. The maximum von Mises stress in the implant was highest for the multilevel DCI model. Our study also showed that the shape of the DCI permitted flexion/extension relatively more compared to lateral bending and axial rotation.

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“…A validated FE model of C2-C7 cervical spine was used in this study [ Figure 2 ]. [ 15 ] In summary, the FE model was created based on the computed tomography (CT) scans of a healthy adult subject. The CT scans were used for three-dimensional (3D) reconstruction of cervical spine anatomy.…”

Section: Methodsmentioning

confidence: 99%

Total disc replacement alters the biomechanics of cervical spine based on sagittal cervical alignment

Goel

Mumtaz

Mendoza

et al. 2022

Journal of Craniovertebral Junction and Spine

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Introduction The correlation between cervical alignment and clinical outcome of total disc replacement (TDR) surgery is arguable. We believe that this conflict exists because the parameters that influence the biomechanics of the cervical spine are not well understood, specifically the effect of TDR on different cervical alignments. Methods: A validated osseo-ligamentous model from C2-C7 was used in this study. The C2-C7 Cobb angle of the base model was modified to represent: lordotic (−10°), straight (0°), and kyphotic (+10°) cervical alignment. The TDR surgery was simulated at the C5-C6 segment. The range of motion (ROM), intradiscal pressure, annular stresses, and facet loads were computed for all the models. Results: The ROM results demonstrated kyphotic alignment after TDR surgery to be the most mobile when compared to intact base model (41% higher in flexion–extension, 51% higher in lateral bending, and 27% higher in axial rotation) followed by straight and lordotic alignment, respectively. The annular stresses for the kyphotic alignment when compared to intact base model were higher at the index level (33% higher in flexion–extension and 48% higher in lateral bending) compared to other alignments. The lordotic model demonstrated higher facet contact forces at the index level (75% higher in extension than kyphotic alignment, 51% higher in lateral bending than kyphotic alignment, and 78% higher in axial rotation than kyphotic alignment) when compared among the three alignment models. Conclusion: Preoperative cervical alignment should be an integral part of surgical planning for TDR surgery as different cervical alignments may significantly alter the postsurgical outcomes.

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Biomechanical Analysis of Posterior Ligaments of Cervical Spine and Laminoplasty

Cited by 13 publications

References 49 publications

The Biomechanical Analysis of Jumping Difficulty Movement in National Traditional Sports

The Biomechanical Analysis of Jumping Difficulty Movement in National Traditional Sports

Investigation into Cervical Spine Biomechanics Following Single, Multilevel and Hybrid Disc Replacement Surgery with Dynamic Cervical Implant and Fusion: A Finite Element Study

Total disc replacement alters the biomechanics of cervical spine based on sagittal cervical alignment

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