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Lumbar Spine Orientation Affects Compressive Fracture Outcome.

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Title: Lumbar Spine Orientation Affects Compressive Fracture Outcome.
Authors: Cutlan, Rachel1 (AUTHOR), Khokhar, Muhammad2 (AUTHOR), Shammout, Nader2 (AUTHOR), Shah, Alok S.2 (AUTHOR), Frazer, Lance3 (AUTHOR), Yoganandan, Narayan2,4 (AUTHOR), Shender, Barry S.5 (AUTHOR), Sheehy, James5 (AUTHOR), Paskoff, Glenn5 (AUTHOR), Nicolella, Daniel3 (AUTHOR), Bentley, Timothy6 (AUTHOR), Shabani, Saman2 (AUTHOR), Stemper, Brian D.1,2,4 (AUTHOR) bstemper@mcw.edu
Source: Annals of Biomedical Engineering. Apr2026, Vol. 54 Issue 4, p1076-1085. 10p.
Subjects: Vertebral fractures, Spinal curvatures, Biomechanics, Lumbar vertebrae, Wounds & injuries, Axial loads, Acceleration (Mechanics)
Abstract: Purpose: Understanding how spinal orientation affects injury outcome is essential to understand lumbar injury biomechanics associated with high-rate vertical loading. Methods: Whole-column human lumbar spines (T12–L5) were dynamically loaded using a drop tower to simulate peak axial forces associated with high-speed aircraft ejections and helicopter crashes. Spines were allowed to maintain natural lordotic curvature for loading, resulting in a range of orientations. Pre-test X-rays were used to quantify specimen orientation at the time of loading. Primary fracture types were identified (wedge, n = 6; burst, n = 4; hyperextension, n = 4) and compared for loading parameters and lumbar orientation. Results: Fracture type was dependent on peak acceleration, bending moment, Cobb angle, sagittal spinal tilt, and location of the applied load. Conclusions: Lumbar spine orientation under high-rate axial acceleration affected the resulting fracture type. Analysis of pre-test X-rays revealed that spines that sustained wedge and burst fractures were oriented straighter at the time of loading. The load was applied centrally to T12 in spines with burst fractures, and anteriorly to T12 in spines with wedge fractures. Spines that sustained hyperextension fracture had lower peak accelerations, larger Cobb angles at the time of loading, and sustained larger extension moments. Fracture presentation is an important and understudied factor that influences biomechanical stability, clinical course, and long-term patient outcomes. [ABSTRACT FROM AUTHOR]
Copyright of Annals of Biomedical Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Lumbar Spine Orientation Affects Compressive Fracture Outcome.
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  Data: <searchLink fieldCode="AR" term="%22Cutlan%2C+Rachel%22">Cutlan, Rachel</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Khokhar%2C+Muhammad%22">Khokhar, Muhammad</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shammout%2C+Nader%22">Shammout, Nader</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shah%2C+Alok+S%2E%22">Shah, Alok S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Frazer%2C+Lance%22">Frazer, Lance</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yoganandan%2C+Narayan%22">Yoganandan, Narayan</searchLink><relatesTo>2,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shender%2C+Barry+S%2E%22">Shender, Barry S.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sheehy%2C+James%22">Sheehy, James</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Paskoff%2C+Glenn%22">Paskoff, Glenn</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nicolella%2C+Daniel%22">Nicolella, Daniel</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bentley%2C+Timothy%22">Bentley, Timothy</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shabani%2C+Saman%22">Shabani, Saman</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Stemper%2C+Brian+D%2E%22">Stemper, Brian D.</searchLink><relatesTo>1,2,4</relatesTo> (AUTHOR)<i> bstemper@mcw.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22Annals+of+Biomedical+Engineering%22">Annals of Biomedical Engineering</searchLink>. Apr2026, Vol. 54 Issue 4, p1076-1085. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Vertebral+fractures%22">Vertebral fractures</searchLink><br /><searchLink fieldCode="DE" term="%22Spinal+curvatures%22">Spinal curvatures</searchLink><br /><searchLink fieldCode="DE" term="%22Biomechanics%22">Biomechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Lumbar+vertebrae%22">Lumbar vertebrae</searchLink><br /><searchLink fieldCode="DE" term="%22Wounds+%26+injuries%22">Wounds & injuries</searchLink><br /><searchLink fieldCode="DE" term="%22Axial+loads%22">Axial loads</searchLink><br /><searchLink fieldCode="DE" term="%22Acceleration+%28Mechanics%29%22">Acceleration (Mechanics)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Purpose: Understanding how spinal orientation affects injury outcome is essential to understand lumbar injury biomechanics associated with high-rate vertical loading. Methods: Whole-column human lumbar spines (T12–L5) were dynamically loaded using a drop tower to simulate peak axial forces associated with high-speed aircraft ejections and helicopter crashes. Spines were allowed to maintain natural lordotic curvature for loading, resulting in a range of orientations. Pre-test X-rays were used to quantify specimen orientation at the time of loading. Primary fracture types were identified (wedge, n = 6; burst, n = 4; hyperextension, n = 4) and compared for loading parameters and lumbar orientation. Results: Fracture type was dependent on peak acceleration, bending moment, Cobb angle, sagittal spinal tilt, and location of the applied load. Conclusions: Lumbar spine orientation under high-rate axial acceleration affected the resulting fracture type. Analysis of pre-test X-rays revealed that spines that sustained wedge and burst fractures were oriented straighter at the time of loading. The load was applied centrally to T12 in spines with burst fractures, and anteriorly to T12 in spines with wedge fractures. Spines that sustained hyperextension fracture had lower peak accelerations, larger Cobb angles at the time of loading, and sustained larger extension moments. Fracture presentation is an important and understudied factor that influences biomechanical stability, clinical course, and long-term patient outcomes. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Annals of Biomedical Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10439-024-03604-y
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