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Patient-specific spinal bone screw fixation: homogenized versus voxel-based finite element analysis

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Title: Patient-specific spinal bone screw fixation: homogenized versus voxel-based finite element analysis
Authors: Einafshar, Mohammadjavad, Rouyin, Alireza, Rajairad, Mohadeseh, Salmani, Mohammadjavad, Farahmand, Farzam, Arjmand, Navid
Source: Einafshar, M, Rouyin, A, Rajairad, M, Salmani, M, Farahmand, F & Arjmand, N 2023, Patient-specific spinal bone screw fixation: homogenized versus voxel-based finite element analysis. in Program & Abstracts : 15th Annual Meeting of the Danish Society of Biomechanics. pp. 28, 15th Annual DBS Meeting, Danish Society of Biomechanics, Aalborg, Denmark, 24/11/2023.
Publisher Information: 2023.
Publication Year: 2023
Subject Terms: Pull-out test, Bone-implant intereface, complexity of validation, Bone screw fixation
Description: Bone screws are vital for orthopedic procedures but often lead to issues like dislocation and bone problems. Current testing with cadaver bones is slow and lacks consistency [1,2]. Computer simulations provide a faster, cost-effective way to assess screw designs and reduce the need for human samples. Numerical models consider factors like geometry and materials but struggle with bone variability [3]. Micro finite element analysis shows promise but needs to accurately represent non-linear effects and the bone-screw interface. Few studies have compared numerical models to mechanical tests, especially concerning stiffness and strength [4]. This study aims to quantify pull-out characteristics of bone screw in both homogenized and non-homogenized material.
Document Type: Conference object
File Description: application/pdf
Language: English
Access URL: https://vbn.aau.dk/da/publications/df658248-da05-46be-97ff-db258b319688
https://vbn.aau.dk/ws/files/617448662/DBS_2023_Bone_Screw_Fixation.pdf
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  Data: Patient-specific spinal bone screw fixation: homogenized versus voxel-based finite element analysis
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  Data: <searchLink fieldCode="AR" term="%22Einafshar%2C+Mohammadjavad%22">Einafshar, Mohammadjavad</searchLink><br /><searchLink fieldCode="AR" term="%22Rouyin%2C+Alireza%22">Rouyin, Alireza</searchLink><br /><searchLink fieldCode="AR" term="%22Rajairad%2C+Mohadeseh%22">Rajairad, Mohadeseh</searchLink><br /><searchLink fieldCode="AR" term="%22Salmani%2C+Mohammadjavad%22">Salmani, Mohammadjavad</searchLink><br /><searchLink fieldCode="AR" term="%22Farahmand%2C+Farzam%22">Farahmand, Farzam</searchLink><br /><searchLink fieldCode="AR" term="%22Arjmand%2C+Navid%22">Arjmand, Navid</searchLink>
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  Data: Einafshar, M, Rouyin, A, Rajairad, M, Salmani, M, Farahmand, F & Arjmand, N 2023, Patient-specific spinal bone screw fixation: homogenized versus voxel-based finite element analysis. in Program & Abstracts : 15th Annual Meeting of the Danish Society of Biomechanics. pp. 28, 15th Annual DBS Meeting, Danish Society of Biomechanics, Aalborg, Denmark, 24/11/2023.
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  Data: Bone screws are vital for orthopedic procedures but often lead to issues like dislocation and bone problems. Current testing with cadaver bones is slow and lacks consistency [1,2]. Computer simulations provide a faster, cost-effective way to assess screw designs and reduce the need for human samples. Numerical models consider factors like geometry and materials but struggle with bone variability [3]. Micro finite element analysis shows promise but needs to accurately represent non-linear effects and the bone-screw interface. Few studies have compared numerical models to mechanical tests, especially concerning stiffness and strength [4]. This study aims to quantify pull-out characteristics of bone screw in both homogenized and non-homogenized material.
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