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Mughal, Waqar
01-26-2004, 03:46 AM
Hello everyone,

I'm looking for values of ultimate strength of the lumbar vertebral spinal
units due to failure (e.g., end-plate fracture, vertebral body crushing,
prolapsed disc) as a result of repetitive loading.

I am wondering what other researchers are using for values of ultimate
strength for lumbar vertebral spinal units, determined from failure (e.g.,
end-plate fracture, vertebral body crushing, prolapsed disc) as a result of
repetitive loading, specifically for human females. The research papers I
have examined (Hutton & Adams, 1982, Spine 7(6); Hansson, Roos & Nachemson,
1980, Spine 5(1)) have cadaver data from older subjects. Here's what I've
found:

Hutton & Adams: mean ultimate strength females = 4949N; SD=766N;
n=8; mean age: 52.5; age range: 40-73
Hansson et al: mean ultimate strength females = 3977N; SD=1243N;
n=21; mean age: 57.7; age range: 34-74

I have searched the Biomech-L archive and couldn't find any additional
references. I have also searched Medline with no reasonable findings.

The population I'm interested in is average female workers in healthcare.
The approximate range I am looking for is 20-60 year old females.

I would also be interested in your opinions on the reasonableness of the
above data.

Any assistance is appreciated.

Regards,
Waqar Mughal
M.Sc. Student
School of Kinesiology
Simon Fraser University

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