TY - GEN
T1 - Validation of Compressive Test of Biodegradable Lumbar Interbody Spinal Cage with Different Porous Structure Using Computed Tomography-Based Finite Element Analysis
AU - Jalil, Muhammad Hilmi
AU - Mazlan, M. H.
AU - Todo, M.
N1 - Funding Information:
The medical data was kindly provided by collaboration with Juntendo University and Kyushu University, Japan. The authors would like to thanks the Universiti Malaysia Pahang (www.ump.edu.my) and Malaysia Ministry of Education, for laboratory facilities and financial assistance under FRGS-RACER Research Grant project No. RACER/1/2019/TK03/UMP//2.
Funding Information:
Acknowledgements The medical data was kindly provided by collaboration with Juntendo University and Kyushu University, Japan. The authors would like to thanks the Universiti Malaysia Pahang (www.ump.edu.my) and Malaysia Ministry of Education, for laboratory facilities and financial assistance under FRGS-RACER Research Grant project No. RACER/1/2019/TK03/UMP//2.
Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2022
Y1 - 2022
N2 - Evaluation of spinal cage structures had been done using Computed tomography-based finite element analysis (CT/FEA) with homogenous bone properties. However, it is important to consider the inhomogeneity of bone properties in order to obtain more precise validation. This study compares the experimental and numerical analysis of CT/FEA by establishing relation between the Hounsfield Unit (HU) values, bone density and material properties. 6 cage designs with different pore structure were created and optimized based on the conventional bullet-shaped tip cage design. Specimens were fabricated using a fused deposition method (FDM) 3D printer. Unidirectional compression test machine was done and evaluated using FEA tool. A conventional bilateral mode configuration was applied to simulate standard PLIF procedure in the L4–L5. CT/FEA was done to characterize the stress profile of cage-endplate interface, cage body and failed element distribution. From the results, layers deviation and severe micro crack were seen at ruptured spinal cage specimen’s side surface. OPEN SOLID showed highest value of compressive value in the experiment and simulation. Finally, FEM stress profiles indicated that subsidence might have occurred for CLOSE 1 mm, OPEN SOLID, and OPEN 1 mm cage designs at the cage-endplate interface due to the sudden spike at endplate region. Overall, optimally designed PLA spinal cages have sufficient mechanical properties to support lumbar interbody loads. Furthermore, this optimization technique may be utilized to balance the complex requirements of load-transfer, stress shielding, and porosity when using biodegradable material for fusion spinal cages.
AB - Evaluation of spinal cage structures had been done using Computed tomography-based finite element analysis (CT/FEA) with homogenous bone properties. However, it is important to consider the inhomogeneity of bone properties in order to obtain more precise validation. This study compares the experimental and numerical analysis of CT/FEA by establishing relation between the Hounsfield Unit (HU) values, bone density and material properties. 6 cage designs with different pore structure were created and optimized based on the conventional bullet-shaped tip cage design. Specimens were fabricated using a fused deposition method (FDM) 3D printer. Unidirectional compression test machine was done and evaluated using FEA tool. A conventional bilateral mode configuration was applied to simulate standard PLIF procedure in the L4–L5. CT/FEA was done to characterize the stress profile of cage-endplate interface, cage body and failed element distribution. From the results, layers deviation and severe micro crack were seen at ruptured spinal cage specimen’s side surface. OPEN SOLID showed highest value of compressive value in the experiment and simulation. Finally, FEM stress profiles indicated that subsidence might have occurred for CLOSE 1 mm, OPEN SOLID, and OPEN 1 mm cage designs at the cage-endplate interface due to the sudden spike at endplate region. Overall, optimally designed PLA spinal cages have sufficient mechanical properties to support lumbar interbody loads. Furthermore, this optimization technique may be utilized to balance the complex requirements of load-transfer, stress shielding, and porosity when using biodegradable material for fusion spinal cages.
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U2 - 10.1007/978-981-16-4115-2_12
DO - 10.1007/978-981-16-4115-2_12
M3 - Conference contribution
AN - SCOPUS:85116897551
SN - 9789811641145
T3 - Lecture Notes in Mechanical Engineering
SP - 153
EP - 167
BT - Human-Centered Technology for a Better Tomorrow - Proceedings of HUMENS 2021
A2 - Hassan, Mohd Hasnun
A2 - Ahmad (a) Manap, Zulkifli
A2 - Baharom, Mohamad Zairi
A2 - Johari, Nasrul Hadi
A2 - Jamaludin, Ummu Kulthum
A2 - Jalil, Muhammad Hilmi
A2 - Mat Sahat, Idris
A2 - Omar, Mohd Nadzeri
PB - Springer Science and Business Media Deutschland GmbH
T2 - Human Engineering Symposium, HUMENS 2021
Y2 - 22 February 2021 through 22 February 2021
ER -