Prótese para substituição total de disco intervertebral: desenvolvimento de modelo computacional e análise por elementos finitos

Campello, Tiago Nunes; Silva, Isaac Newton Lima da; Simões, Marcelo Simoni

doi:10.1590/s1808-18512009000100008

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…The metal-metal contact exacerbated the stress on these points, increasing friction during extension, lateral bending, and flexion. Studies on cervical devices observed that the core of the prosthesis is the most stressed component during axial compression and compression/shear (MUMMANENI et al, 2007;CAMPELLO et al, 2009). The distribution of stresses on the cranial surface of the P2 vertical plate is also explained by the lack of a shock-absorber on the metal contact surfaces.…”

Section: Applied Forcementioning

confidence: 99%

“…Another limitation is that the contact was considered perfect in the FE analysis, but the coefficient of friction between the two parts of the prostheses was not considered. Knowledge of the behavior of biomedical devices under cyclic loads is fundamental because cyclic fatigue in the implanted materials is one of the most critical failures observed in cervical disc prosthesis (CAMPELLO et al, 2009). Therefore, additional biomechanical and long-term follow-up studies are needed to properly assess the biomechanics and safety of this type of device (BARBIER et al, 1998).…”

Section: Applied Forcementioning

confidence: 99%

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Finite element analysis of a new intervertebral disc prosthesis developed for the canine cervical spine

et al. 2023

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Cervical spondylomyelopathy (CSM) is a disease that affects mostly large- and giant-breed dogs. It is characterized by abnormalities of the cervical spine that may cause damage to the spinal cord and nerve roots. Cervical disc arthroplasty has been proposed as a treatment option in veterinary medicine. The current study evaluated the main stresses in a novel canine vertebral disc prosthesis and vertebral bodies using finite element analysis. Two experimental groups were created based on the material used for the prosthesis: stainless steel group (SSG) and titanium alloy group (TAG). Vertebral and prosthetic average equivalents von-Mises stress (VMS) and minimum principal stress (MiPS) were assessed while compressive, tensile, and lateral bending shear loads were applied. The stainless steel group had greater VMS distribution on all the evaluated parameters while the titanium alloy group had greater MiPS. Stresses were more concentrated on the lateral and ventral surfaces of the vertebral bodies than on their endplates. The average prosthetic stresses were more concentrated on the bone/implant contact surface than on the prosthesis/screw interface. Maximum stresses were concentrated in the screws’ cranial surface. The novel prosthesis allows even distribution along the vertebral body. Comparing prosthesis materials, titanium alloy was marginally superior regarding average stresses in all directions and should be less likely to suffer subsidence.

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Section: Applied Forcementioning

confidence: 99%

Section: Applied Forcementioning

confidence: 99%

Finite element analysis of a new intervertebral disc prosthesis developed for the canine cervical spine

et al. 2023

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Development of an intervertebral disc prosthesis prototype for the canine cervical spine

et al. 2023

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Cervical arthroplasty with disc prosthesis has been proposed as a treatment option for dogs with Cervical Spondylomyelopathy. The present study developed a novel vertebral disc prosthesis for dogs. Sixteen Functional Spinal Units (C5-C6) were collected from dog cadavers with body weights ranging between 25 and 35 kg, and their vertebral measurements were used to design a prosthetic disc. The sizing of the prosthesis was performed based on the averages of the measurements of width, height, and length of the vertebral bodies from C5-C6 of all specimens. The prosthesis was developed using the Rhinoceros 3D® and SolidWorks® programs, and 3D prototyping was carried out to define the best design. The developed prosthesis consisted of two independent parts that are fixed to the cranial and caudal vertebral bodies, in the intervertebral space, and fitted together by metal-to-metal surfaces capable of moving in the lateral, ventral, and dorsal directions. Each part of the prosthesis is angled in two portions: vertically, in the intervertebral space, and horizontally, in contact with the ventral surface of the vertebral bodies, both of which are fixed by means of monocortical locking screws. The design of the developed prototype allowed a good fit in the intervertebral space between C4-C5, C5-C6, and C6-C7.

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Prótese para substituição total de disco intervertebral: desenvolvimento de modelo computacional e análise por elementos finitos

Cited by 2 publications

References 4 publications

Finite element analysis of a new intervertebral disc prosthesis developed for the canine cervical spine

Finite element analysis of a new intervertebral disc prosthesis developed for the canine cervical spine

Development of an intervertebral disc prosthesis prototype for the canine cervical spine

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