Mechanical assessment of a titanium cervical spine corpectomy cage assembled with 3D-printed patient-specific endplate-conformed contact surfaces and a traditionally manufactured expandable mechanism
में बचाया:
| में प्रकाशित: | 3D Printing in Medicine vol. 11, no. 1 (Dec 2025), p. 50 |
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| मुख्य लेखक: | |
| अन्य लेखक: | , , |
| प्रकाशित: |
Springer Nature B.V.
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| विषय: | |
| ऑनलाइन पहुंच: | Citation/Abstract Full Text Full Text - PDF |
| टैग: |
कोई टैग नहीं, इस रिकॉर्ड को टैग करने वाले पहले व्यक्ति बनें!
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| 001 | 3264443584 | ||
| 003 | UK-CbPIL | ||
| 022 | |a 2365-6271 | ||
| 024 | 7 | |a 10.1186/s41205-025-00299-2 |2 doi | |
| 035 | |a 3264443584 | ||
| 045 | 2 | |b d20251201 |b d20251231 | |
| 100 | 1 | |a Shen, Shih-Chieh |u National Yang Ming Chaio Tung University, Department of Biomedical Engineering, Taipei, Taiwan (GRID:grid.260539.b) (ISNI:0000 0001 2059 7017); Tri-Service General Hospital Songshan Branch, National Defense Medical Center, Department of Surgery, Taipei, Taiwan (GRID:grid.260539.b) | |
| 245 | 1 | |a Mechanical assessment of a titanium cervical spine corpectomy cage assembled with 3D-printed patient-specific endplate-conformed contact surfaces and a traditionally manufactured expandable mechanism | |
| 260 | |b Springer Nature B.V. |c Dec 2025 | ||
| 513 | |a Journal Article | ||
| 520 | 3 | |a This study developed a new titanium cervical spine expandable corpectomy cage (ECC) that consisted of two superior/inferior patient-specific endplate-conformed contact surfaces (PECSs) fabricated through 3D printing and a standardized centrally expandable mechanism (CEM) manufactured using traditional machining. Fatigue testing was conducted to evaluate whether the components of ECC could be assembled using different manufacturing methods to meet the functional testing requirements in compliance with FDA regulations. The titanium 3D-printed superior/inferior PECSs were designed based on the CT images/CAD system to assembly with a CNC milling/precision wire cutting cuboid CEM (14 mm square cross-section) expansion driven by a set of sliders interlocked via key and keyway mechanisms for the ECC of two-segmental vertebral bodies. The ECC underwent FDA-compliant static/dynamic compression, shear, torsion, subsidence tests and finite element (FE) analysis for understanding the stress differences on endplates between PECS and flat-shaped endplate contact surface (FECS). Stiffness/yield strength were found to be 2127 ± 146 N/mm/8547 ± 1213 N for the compression test, 1158 ± 139 N/mm/ 2561 ± 114 N for the shear test, and 1.22 ± 0.32 Nm/deg/16.5 ± 0.58 Nm for the torque test. Some failure samples showed that fixation screws were fractured/loosened under the shear test. The endure limits were 1600 N, 350 N and 1.0 N*m under compression, shear and torsion cyclic load tests, respectively. The results of the static axial compression and static/dynamic compression-shear testing did not meet the acceptance criteria of ISO 23,089. The PECS with higher stiffness value showed that better subsidence resistance was achieved than FECS and was consistent with that the maximum stress value and distribution for the FECS were more harmful than those for the PECS models. This study demonstrated that mechanical testing is essential when assembling 3D-printed components with CNC-manufactured parts in multi-component medical implants, as mismatches in interface behavior may result in mechanical failure. The results of FE analysis and subsidence tests indicated that PECS can decrease stress concentration between the ECC and endplates to present better performance for subsidence resistance. | |
| 651 | 4 | |a United States--US | |
| 653 | |a Finite element method | ||
| 653 | |a Tomography | ||
| 653 | |a Acceptance criteria | ||
| 653 | |a Titanium | ||
| 653 | |a Stress concentration | ||
| 653 | |a Numerical controls | ||
| 653 | |a Boolean | ||
| 653 | |a Contact stresses | ||
| 653 | |a Stiffness | ||
| 653 | |a Functional testing | ||
| 653 | |a Assembling | ||
| 653 | |a Subsidence | ||
| 653 | |a Axial compression | ||
| 653 | |a Three dimensional printing | ||
| 653 | |a Manufacturing | ||
| 653 | |a Shear tests | ||
| 653 | |a Titanium alloys | ||
| 653 | |a Load tests | ||
| 653 | |a Computed tomography | ||
| 653 | |a Milling (machining) | ||
| 653 | |a Computer aided design--CAD | ||
| 653 | |a 3-D printers | ||
| 653 | |a Spine (cervical) | ||
| 653 | |a Fatigue tests | ||
| 653 | |a Mechanical tests | ||
| 653 | |a Vertebrae | ||
| 653 | |a Cages | ||
| 653 | |a Cyclic loads | ||
| 653 | |a Surgical implants | ||
| 653 | |a Compression | ||
| 653 | |a Skin & tissue grafts | ||
| 653 | |a Production methods | ||
| 653 | |a Mechanical properties | ||
| 700 | 1 | |a Huang, Shao-Fu |u National Yang Ming Chaio Tung University, Department of Biomedical Engineering, Taipei, Taiwan (GRID:grid.260539.b) (ISNI:0000 0001 2059 7017) | |
| 700 | 1 | |a Sun, Wei-Hsiang |u National Yang Ming Chaio Tung University, Department of Biomedical Engineering, Taipei, Taiwan (GRID:grid.260539.b) (ISNI:0000 0001 2059 7017) | |
| 700 | 1 | |a Lin, Chun-Li |u National Yang Ming Chaio Tung University, Department of Biomedical Engineering, Innovation & Translation Center of Medical Device, Taipei, Taiwan (GRID:grid.260539.b) (ISNI:0000 0001 2059 7017) | |
| 773 | 0 | |t 3D Printing in Medicine |g vol. 11, no. 1 (Dec 2025), p. 50 | |
| 786 | 0 | |d ProQuest |t Health & Medical Collection | |
| 856 | 4 | 1 | |3 Citation/Abstract |u https://www.proquest.com/docview/3264443584/abstract/embedded/L8HZQI7Z43R0LA5T?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text |u https://www.proquest.com/docview/3264443584/fulltext/embedded/L8HZQI7Z43R0LA5T?source=fedsrch |
| 856 | 4 | 0 | |3 Full Text - PDF |u https://www.proquest.com/docview/3264443584/fulltextPDF/embedded/L8HZQI7Z43R0LA5T?source=fedsrch |