Elementos finitos de uma nova prótese de disco intervertebral desenvolvida para a coluna cervical canina

Ciencia Rural

article

Paulo Vinícius Tertuliano Marinho¹  Ana Paula Macedo²  Cláudio Pereira de Sampaio³  Antônio Carlos Shimano²  Carolina Camargo Zani Marinho¹  Mônica Vicky Bahr Arias³ 

[1]Instituto Federal de Educação

[2]Universidade de São Paulo

[3]Universidade Estadual de Londrina

关键词: finite element model;    canine;    vertebrae;    novel implant;    arthroplasty.;   

DOI  :  10.1590/0103-8478cr20210893

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

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.

【 授权许可】

Unknown