Finite element method study: the effect of insertion torque and angle on pedicle screw loosening

Pedicle screws are widely used for the treatment of spinal instability by spine fusion. This treatment can be performed at any level in the spine (cervical, thoracic or lumbar) and prevents any movement between the fused vertebrae. However screw loosening is a major problem of spine fusion, contribu...

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Main Authors:	Rosdi, Daud, M., Syakir, Mas Ayu, Hassan, Arman Shah, Abdullah
Format:	Conference or Workshop Item
Language:	English English
Published:	Universiti Malaysia Pahang 2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/27646/ http://umpir.ump.edu.my/id/eprint/27646/1/6.%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf http://umpir.ump.edu.my/id/eprint/27646/2/6.1%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf

id	ump-27646
recordtype	eprints
spelling	ump-276462020-02-03T06:44:08Z http://umpir.ump.edu.my/id/eprint/27646/ Finite element method study: the effect of insertion torque and angle on pedicle screw loosening Rosdi, Daud M., Syakir Mas Ayu, Hassan Arman Shah, Abdullah TJ Mechanical engineering and machinery Pedicle screws are widely used for the treatment of spinal instability by spine fusion. This treatment can be performed at any level in the spine (cervical, thoracic or lumbar) and prevents any movement between the fused vertebrae. However screw loosening is a major problem of spine fusion, contributing to delayed patient recovery. This appears to be a minor problem for fixation and fusion of healthy, non-osteoporotic bone. Screw loosening happen when insertion torque and angle that are not suitable for pedicle screw which affected the screw pullout strength. Based on optimum torque and angle in finite element analysis, loosening of screw in spine fusion can be minimized by increasing the screw pullout strength. The highest of pull out strength can minor the loosening of screw. Four insertion angle of pedicle screw were used which are 0°, 10°, 20° and 30°. Besides that, effect of insertion torque on pullout strength can be seen on Equivalent von Mises stress value when applied three value of moment to pedicle screw-bone with constant of insertion angle. The lowest stress for pedicle screw can give a better fixation with bone and thus can increase the pullout strength. We found that the insertion angle 10° give higher pullout strength of pedicle screw-synthetic bone which indirectly will minimizing the effect of the screw loosening from bone. Besides that, insertion torque with 1200 Nm give a lower Equivalent von Mises stress which it cause the less effect on fixation between screw and bone and thus has potential in minimizing the loosening to pedicle screw. Universiti Malaysia Pahang 2019 Conference or Workshop Item PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/27646/1/6.%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf pdf en http://umpir.ump.edu.my/id/eprint/27646/2/6.1%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf Rosdi, Daud and M., Syakir and Mas Ayu, Hassan and Arman Shah, Abdullah (2019) Finite element method study: the effect of insertion torque and angle on pedicle screw loosening. In: The 4th International Conference on Frontiers of Composite Materials, 13 - 16 November 2019 , The University of Queensland, Brisbane, Australia. pp. 1-10.. (Unpublished)
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Rosdi, Daud M., Syakir Mas Ayu, Hassan Arman Shah, Abdullah Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
description	Pedicle screws are widely used for the treatment of spinal instability by spine fusion. This treatment can be performed at any level in the spine (cervical, thoracic or lumbar) and prevents any movement between the fused vertebrae. However screw loosening is a major problem of spine fusion, contributing to delayed patient recovery. This appears to be a minor problem for fixation and fusion of healthy, non-osteoporotic bone. Screw loosening happen when insertion torque and angle that are not suitable for pedicle screw which affected the screw pullout strength. Based on optimum torque and angle in finite element analysis, loosening of screw in spine fusion can be minimized by increasing the screw pullout strength. The highest of pull out strength can minor the loosening of screw. Four insertion angle of pedicle screw were used which are 0°, 10°, 20° and 30°. Besides that, effect of insertion torque on pullout strength can be seen on Equivalent von Mises stress value when applied three value of moment to pedicle screw-bone with constant of insertion angle. The lowest stress for pedicle screw can give a better fixation with bone and thus can increase the pullout strength. We found that the insertion angle 10° give higher pullout strength of pedicle screw-synthetic bone which indirectly will minimizing the effect of the screw loosening from bone. Besides that, insertion torque with 1200 Nm give a lower Equivalent von Mises stress which it cause the less effect on fixation between screw and bone and thus has potential in minimizing the loosening to pedicle screw.
format	Conference or Workshop Item
author	Rosdi, Daud M., Syakir Mas Ayu, Hassan Arman Shah, Abdullah
author_facet	Rosdi, Daud M., Syakir Mas Ayu, Hassan Arman Shah, Abdullah
author_sort	Rosdi, Daud
title	Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
title_short	Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
title_full	Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
title_fullStr	Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
title_full_unstemmed	Finite element method study: the effect of insertion torque and angle on pedicle screw loosening
title_sort	finite element method study: the effect of insertion torque and angle on pedicle screw loosening
publisher	Universiti Malaysia Pahang
publishDate	2019
url	http://umpir.ump.edu.my/id/eprint/27646/ http://umpir.ump.edu.my/id/eprint/27646/1/6.%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf http://umpir.ump.edu.my/id/eprint/27646/2/6.1%20Finite%20element%20method%20study%20-%20the%20effect%20of%20insertion.pdf
first_indexed	2023-09-18T22:43:27Z
last_indexed	2023-09-18T22:43:27Z
_version_	1777417068180668416

Finite element method study: the effect of insertion torque and angle on pedicle screw loosening

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