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Updated: Jul 18, 2026
07:09
In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
Published on: March 7, 2014
Bilateral intra-annular spinal compressive stresses in vivo
D I Bylski-Austrow1, D L Glos, F E Sauser
1Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
Studies in Health Technology and Informatics
|November 17, 2006
Summary
This pilot study investigated intervertebral disc stresses in pigs. Compressive stresses in the annulus fibrosus varied with activity and were reduced by spinal implants.
Area of Science:
- Biomechanical Engineering
- Veterinary Orthopedics
Background:
- The annulus fibrosus of the intervertebral disc is crucial for spinal stability.
- Understanding in vivo disc mechanics is essential for developing effective treatments.
Purpose of the Study:
- To assess if compressive stresses within the annulus fibrosus change with activity in a quadruped model.
- To investigate the effect of a spinal implant on these stresses.
Main Methods:
- Pilot in vivo study using skeletally immature domestic pigs.
- Implantation of stress sensors in the annulus fibrosus at T8-9 and T10-11.
- Application of a staple across the T8-9 vertebra to simulate an implant.
Main Results:
- Cyclic stresses were detected in the annulus fibrosus during normal activities like walking and sitting.
- Stresses were significantly attenuated at the stapled (implanted) vertebra compared to the unstapled vertebra.
Conclusions:
- Compressive stresses in the intervertebral disc annulus vary with physical activity.
- Spinal implants may alter and potentially reduce these biomechanical stresses.
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