Back to Search
Start Over
The effects of a new shape-memory alloy interspinous process device on the distribution of intervertebral disc pressures in vitro
- Source :
-
Journal of Biomedical Research . Mar2010, Vol. 24 Issue 2, p115-123. 9p. - Publication Year :
- 2010
-
Abstract
- Abstract: This study was designed to measure the pressure distribution of the intervertebral disc under different degrees of distraction of the interspinous process, because of a suspicion that the degree of distraction of the spinous process may have a close relationship with the disc load share. Six human cadaver lumbar spine L2-L5 segments were loaded in flexion, neutral position, and extension. The L3-L4 disc load was measured at each position using pressure measuring films. Shape-memory interspinous process implants (SMID) with different spacer heights, ranging in size from 10 to 20 mm at 2 mm increments, were used. It was found that a SMID with a spacer height equal to the distance of the interspinous process in the neutral position can share the biomechanical disc load without a significant change of load in the anterior annulus. An interspinous process stabilizing device (IPD) would not be appropriate to use in those cases with serious spinal stenosis because the over-distraction of the interspinous process by the SMID would lead to overloading the anterior annulus which is a recognized cause of disc degeneration. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 16748301
- Volume :
- 24
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Biomedical Research
- Publication Type :
- Academic Journal
- Accession number :
- 50372827
- Full Text :
- https://doi.org/10.1016/S1674-8301(10)60019-X