Biomechanical Analysis of Allograft Spacer Failure as a Function of Cortical-Cancellous Ratio in Anterior Cervical Discectomy/Fusion: Allograft Spacer Alone Model
Abstract
:1. Introduction
2. Materials and Methods
2.1. FEM of an Intact Cervical Spine
2.2. Allograft Spacer Model
2.3. Loading and Boundary Conditions
3. Results
3.1. Range of Motion
3.2. Stress Analysis of Cervical Spacers with Different Cortico-Cancellous Ratios
3.3. Stress Analysis of Endplates of Involved Lower Cervical Segments
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Component Name | Young’s Modulus (MPa) | Poisson’s Ratio | Ref. |
---|---|---|---|
Cortical bone | 12,000 | 0.3 | [22] |
Cancellous bone | 100 | 0.29 | [18] |
Posterior element | 3.500 | 0.29 | [16] |
End plate | 500 | 0.4 | [19] |
Annulus matrix | 4.2 | 0.45 | [19] |
Annulus Fibers | 500 | Cross-sectional Area 0.1 (mm2) | [20] |
Nucleus pulposus | 1.0 | 0.499 (Incompressible) | [19] |
Cortical only | Cortico-Cancellous | Cortical lateral Walls with a Cancellous Center Bone | ||||
---|---|---|---|---|---|---|
Cortical | Cancellous | Cortical | Cancellous | Cortical | Cancellous | |
11 mm | 1 | 0 | 1 | 0.32 | 0.46 | 0.54 |
12 mm | 1 | 0 | 1 | 0.28 | 0.47 | 0.53 |
14 mm | 1 | 0 | 1 | 0.23 | 0.47 | 0.53 |
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Kwon, J.-W.; Lee, H.-M.; Park, T.-H.; Lee, S.J.; Kwon, Y.-W.; Moon, S.-H.; Lee, B.H. Biomechanical Analysis of Allograft Spacer Failure as a Function of Cortical-Cancellous Ratio in Anterior Cervical Discectomy/Fusion: Allograft Spacer Alone Model. Appl. Sci. 2020, 10, 6413. https://doi.org/10.3390/app10186413
Kwon J-W, Lee H-M, Park T-H, Lee SJ, Kwon Y-W, Moon S-H, Lee BH. Biomechanical Analysis of Allograft Spacer Failure as a Function of Cortical-Cancellous Ratio in Anterior Cervical Discectomy/Fusion: Allograft Spacer Alone Model. Applied Sciences. 2020; 10(18):6413. https://doi.org/10.3390/app10186413
Chicago/Turabian StyleKwon, Ji-Won, Hwan-Mo Lee, Tae-Hyun Park, Sung Jae Lee, Young-Woo Kwon, Seong-Hwan Moon, and Byung Ho Lee. 2020. "Biomechanical Analysis of Allograft Spacer Failure as a Function of Cortical-Cancellous Ratio in Anterior Cervical Discectomy/Fusion: Allograft Spacer Alone Model" Applied Sciences 10, no. 18: 6413. https://doi.org/10.3390/app10186413