Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation
This study proposes a novel expandable spinal cage to maximize the effectiveness of spinal fusion surgery in the treatment of lumbar disk disorders and aims to verify its mechanical stability through finite element method (FEM) analysis and mechanical testing. To address the limitations of existing...
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| Language: | English |
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MDPI AG
2025-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/15/11/6323 |
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| author | Chanwoo Park Than Trong Khanh Dat Sung-Jun Park Dong-Sik Chae Sung Hoon Choi Jonghun Yoon |
| author_facet | Chanwoo Park Than Trong Khanh Dat Sung-Jun Park Dong-Sik Chae Sung Hoon Choi Jonghun Yoon |
| author_sort | Chanwoo Park |
| collection | DOAJ |
| description | This study proposes a novel expandable spinal cage to maximize the effectiveness of spinal fusion surgery in the treatment of lumbar disk disorders and aims to verify its mechanical stability through finite element method (FEM) analysis and mechanical testing. To address the limitations of existing cages, which do not provide sufficient height and angle expansion and have constraints in independently adjusting height and angle with continuous fine-tuning, this study introduces a new linkage mechanism. This design enables precise spinal alignment restoration tailored to the individual anatomical characteristics of patients, even in minimally invasive surgical environments, distinguishing itself from traditional rack-and-pinion or wedge-based designs. The results of FEM analysis and static load testing demonstrated a high correlation between the predicted yield locations in FEM analysis and actual test results. Furthermore, the compression and compression–shear load tests confirmed that the proposed cage achieved an ultimate load exceeding the lowest fifth percentile of FDA-approved products, meeting clinical requirements. The proposed expandable spinal cage offers significant improvements over existing products and has the potential to evolve into a safer and more effective spinal fusion device through further dynamic fatigue testing and clinical studies to assess long-term durability and practical applicability. |
| format | Article |
| id | doaj-art-232be00bcf0347088dfbdfc91ceb68fe |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-232be00bcf0347088dfbdfc91ceb68fe2025-08-20T03:11:30ZengMDPI AGApplied Sciences2076-34172025-06-011511632310.3390/app15116323Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion OperationChanwoo Park0Than Trong Khanh Dat1Sung-Jun Park2Dong-Sik Chae3Sung Hoon Choi4Jonghun Yoon5Department of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, 55, Hanyangdaehak-ro, Sangnok-gu, Ansan-si 15588, Republic of KoreaFaculty of Mechanical Engineering, Ho Chi Minh City University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 700000, VietnamSchool of Mechanical, Automotive and Aeronautical Engineering, Korea National University of Transportation, Chungju 27469, Republic of KoreaDepartment of Orthopedic Surgery, Catholic Kwandong University International St. Mary’s Hospital, Incheon 22711, Republic of KoreaDepartment of Orthopedic Surgery, Hanyang University College of Medicine, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of KoreaDepartment of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, 55, Hanyangdaehak-ro, Sangnok-gu, Ansan-si 15588, Republic of KoreaThis study proposes a novel expandable spinal cage to maximize the effectiveness of spinal fusion surgery in the treatment of lumbar disk disorders and aims to verify its mechanical stability through finite element method (FEM) analysis and mechanical testing. To address the limitations of existing cages, which do not provide sufficient height and angle expansion and have constraints in independently adjusting height and angle with continuous fine-tuning, this study introduces a new linkage mechanism. This design enables precise spinal alignment restoration tailored to the individual anatomical characteristics of patients, even in minimally invasive surgical environments, distinguishing itself from traditional rack-and-pinion or wedge-based designs. The results of FEM analysis and static load testing demonstrated a high correlation between the predicted yield locations in FEM analysis and actual test results. Furthermore, the compression and compression–shear load tests confirmed that the proposed cage achieved an ultimate load exceeding the lowest fifth percentile of FDA-approved products, meeting clinical requirements. The proposed expandable spinal cage offers significant improvements over existing products and has the potential to evolve into a safer and more effective spinal fusion device through further dynamic fatigue testing and clinical studies to assess long-term durability and practical applicability.https://www.mdpi.com/2076-3417/15/11/6323spinelumbarfusioncageinterbody deviceexpandable |
| spellingShingle | Chanwoo Park Than Trong Khanh Dat Sung-Jun Park Dong-Sik Chae Sung Hoon Choi Jonghun Yoon Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation Applied Sciences spine lumbar fusion cage interbody device expandable |
| title | Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation |
| title_full | Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation |
| title_fullStr | Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation |
| title_full_unstemmed | Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation |
| title_short | Novel Design of Expandable Spinal Cage for Efficient Lumbar Spine Fusion Operation |
| title_sort | novel design of expandable spinal cage for efficient lumbar spine fusion operation |
| topic | spine lumbar fusion cage interbody device expandable |
| url | https://www.mdpi.com/2076-3417/15/11/6323 |
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