Human and bovine spinal disc mechanics subsequent to trypsin injection
Objective: To investigate the biomechanical effects of injections of a protease on the characteristics of bovine coccygeal and human lumbar disc motion segments. Methods: Mechanics of treated tissues were measured immediately after injection and 3 h after injection. Motion segments underwent axial r...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-10-01
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| Series: | Journal of Orthopaedic Translation |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214031X17300013 |
| _version_ | 1811263423833440256 |
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| author | Jeremy Alsup Timothy Bishop Dennis Eggett Anton E. Bowden |
| author_facet | Jeremy Alsup Timothy Bishop Dennis Eggett Anton E. Bowden |
| author_sort | Jeremy Alsup |
| collection | DOAJ |
| description | Objective: To investigate the biomechanical effects of injections of a protease on the characteristics of bovine coccygeal and human lumbar disc motion segments.
Methods: Mechanics of treated tissues were measured immediately after injection and 3 h after injection. Motion segments underwent axial rotation and flexion-extension loading.
Results: Stiffness and neutral zone parameters experienced significant changes over time, with bovine tissues more strongly affected than human cadaver tissues. This was true in both axial rotation and flexion-extension. The treatment type significantly affected the neutral zone measurements in axial rotation. Hysteresis parameters were impacted by control injections.
Conclusion: The extrapolation of bovine coccygeal motion testing results to human lumbar disc mechanics is not yet practical. The injected treatment may have a smaller impact on disc mechanics than time in testing. Viscoelasticity of human lumbar discs may be impacted by any damage to the annulus fibrosis induced by needlestick.
The Translational Potential of this Article: Preclinical testing of novel spinal devices is essential to the design validation and regulatory processes, but current testing techniques rely on cadaveric testing of primarily older spines with essentially random amounts of disc degeneration. The present work investigates the viability of using trypsin injections to create a more uniform preclinical model of disc degeneration from a mechanics perspective, for the purpose of testing spinal devices. Such a model would facilitate translation of new spinal technologies to clinical practice. |
| first_indexed | 2024-04-12T19:45:00Z |
| format | Article |
| id | doaj.art-0f1208b437b14b4da2d002b2819153c5 |
| institution | Directory Open Access Journal |
| issn | 2214-031X |
| language | English |
| last_indexed | 2024-04-12T19:45:00Z |
| publishDate | 2017-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Orthopaedic Translation |
| spelling | doaj.art-0f1208b437b14b4da2d002b2819153c52022-12-22T03:18:59ZengElsevierJournal of Orthopaedic Translation2214-031X2017-10-0111C536110.1016/j.jot.2017.06.003Human and bovine spinal disc mechanics subsequent to trypsin injectionJeremy Alsup0Timothy Bishop1Dennis Eggett2Anton E. Bowden3Department of Mechanical Engineering, Brigham Young University, Provo, UT, USADepartment of Mechanical Engineering, Brigham Young University, Provo, UT, USADepartment of Statistics, Brigham Young University, Provo, UT 84602, USADepartment of Mechanical Engineering, Brigham Young University, Provo, UT, USAObjective: To investigate the biomechanical effects of injections of a protease on the characteristics of bovine coccygeal and human lumbar disc motion segments. Methods: Mechanics of treated tissues were measured immediately after injection and 3 h after injection. Motion segments underwent axial rotation and flexion-extension loading. Results: Stiffness and neutral zone parameters experienced significant changes over time, with bovine tissues more strongly affected than human cadaver tissues. This was true in both axial rotation and flexion-extension. The treatment type significantly affected the neutral zone measurements in axial rotation. Hysteresis parameters were impacted by control injections. Conclusion: The extrapolation of bovine coccygeal motion testing results to human lumbar disc mechanics is not yet practical. The injected treatment may have a smaller impact on disc mechanics than time in testing. Viscoelasticity of human lumbar discs may be impacted by any damage to the annulus fibrosis induced by needlestick. The Translational Potential of this Article: Preclinical testing of novel spinal devices is essential to the design validation and regulatory processes, but current testing techniques rely on cadaveric testing of primarily older spines with essentially random amounts of disc degeneration. The present work investigates the viability of using trypsin injections to create a more uniform preclinical model of disc degeneration from a mechanics perspective, for the purpose of testing spinal devices. Such a model would facilitate translation of new spinal technologies to clinical practice.http://www.sciencedirect.com/science/article/pii/S2214031X17300013mechanicsproteasespinal disctrypsin |
| spellingShingle | Jeremy Alsup Timothy Bishop Dennis Eggett Anton E. Bowden Human and bovine spinal disc mechanics subsequent to trypsin injection Journal of Orthopaedic Translation mechanics protease spinal disc trypsin |
| title | Human and bovine spinal disc mechanics subsequent to trypsin injection |
| title_full | Human and bovine spinal disc mechanics subsequent to trypsin injection |
| title_fullStr | Human and bovine spinal disc mechanics subsequent to trypsin injection |
| title_full_unstemmed | Human and bovine spinal disc mechanics subsequent to trypsin injection |
| title_short | Human and bovine spinal disc mechanics subsequent to trypsin injection |
| title_sort | human and bovine spinal disc mechanics subsequent to trypsin injection |
| topic | mechanics protease spinal disc trypsin |
| url | http://www.sciencedirect.com/science/article/pii/S2214031X17300013 |
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