Post-laminectomy spine strength can be predicted

January 17, 2013
Post-laminectomy spine strength can be predicted
Following lumbar laminectomy, loss of strength and shear stiffness can be predicted in the human lumbar spinal segment using measurable parameters, according to a study published in the December issue of the European Spine Journal.

(HealthDay)—Following lumbar laminectomy, loss of strength and shear stiffness (SS) can be predicted in the human lumbar spinal segment using measurable parameters, according to a study published in the December issue of the European Spine Journal.

Arno Bisschop, from the VU University Medical Center in Amsterdam, and colleagues classified geometry and degeneration of the motion segments in the lumbar spine of patients undergoing facet sparing lumbar laminectomy based on radiographs and . Dual X-ray scans were used to measure and density (BMC and BMD). L2 to L3 and L4 to L5 spinal motion segments were dissected and tested in shear.

The researchers found that, following laminectomy, shear stiffness (SS) decreased by 24 percent, shear yield force (SYF) decreased by 41 percent, and shear force to failure (SFF) declined by 44 percent. SS was significantly associated with intervertebral and facet joint degeneration for segments with laminectomy. Intervertebral disc geometry, BMC, and frontal area were correlated with SYF, and disc length and BMC were linked to SFF. In untreated segments, significant correlations were noted for SS and facet joint tropism; SYF and pedicle geometry; and for SFF with BMC, BMD, and frontal area. For segments with and without laminectomy, SS, SYF, and SFF could be predicted.

"Significant loss of strength and SS are predicted by BMC, BMD, intervertebral disc geometry and degenerative parameters, suggesting that low BMC or BMD, small and absence of osteophytes could predict the possible development of postoperative instability following lumbar laminectomy," the authors write.

More information: Abstract
Full Text

Related Stories

Exercise produces positive effects on the intervertebral discs

June 28, 2011

Physical exercise has a positive effect on the formation of cells in the intervertebral discs. This is shown by a study from the Sahlgrenska Academy, University of Gothenburg, presented at the annual meeting of the International ...

Pattern of disc degeneration impacts low back pain

April 12, 2012

(HealthDay) -- Contiguous, multilevel disc degeneration (CMDD) is associated with increased likelihood of low back pain (LBP) and pain severity compared with skipped level disc degeneration (SLDD), according to a study published ...

Lowest fused vertebral level linked to motion in scoliosis

May 10, 2012

(HealthDay) -- For postoperative patients with adolescent idiopathic scoliosis (AIS), preservation of vertebral motion segments allows for greater distribution of functional motion, according to a study published in the May ...

Upper lumbar disc space related to hip pain

December 21, 2012

(HealthDay)—Disc space narrowing at disc levels L1/L2 and L2/L3, visible on lumbar radiographs, may help to identify hip pain patients whose pain originates in the lumbar spine, according to research published in the November ...

Recommended for you

Experimental MERS vaccine shows promise in animal studies

July 28, 2015

A two-step regimen of experimental vaccines against Middle East respiratory syndrome (MERS) prompted immune responses in mice and rhesus macaques, report National Institutes of Health scientists who designed the vaccines. ...

Can social isolation fuel epidemics?

July 21, 2015

Conventional wisdom has it that the more people stay within their own social groups and avoid others, the less likely it is small disease outbreaks turn into full-blown epidemics. But the conventional wisdom is wrong, according ...

Lack of knowledge on animal disease leaves humans at risk

July 20, 2015

Researchers from the University of Sydney have painted the most detailed picture to date of major infectious diseases shared between wildlife and livestock, and found a huge gap in knowledge about diseases which could spread ...

IBD genetically similar in Europeans and non-Europeans

July 20, 2015

The first genetic study of inflammatory bowel disease (IBD) to include individuals from diverse populations has shown that the regions of the genome underlying the disease are consistent around the world. This study, conducted ...


Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.