Biomechanical analysis of cervical distraction.
Spine (Phila Pa 1976)
; 12(9): 831-7, 1987 Nov.
Article
in En
| MEDLINE
| ID: mdl-3441827
ABSTRACT
A biomechanical analysis of cervical distraction is presented, and a model comparing closed reduction of cervical spine dislocations to spring mechanics is developed. Behavior of a spring may be described as F = k delta x where F = distraction force; delta x = elongation of the spring; and k = spring constant. The records and roentgenograms of 24 cervical spine dislocations were reviewed retrospectively. Evaluation of cervical distraction vs traction weight indicates that Ftraction = kneck delta x; where F = traction weight and x = distraction at the injured level. The constant, kneck, is different for bilateral and unilateral dislocations (P less than .001) and is a function of magnitude of injury and neck morphology. As determined in this study, traction weight needed for reduction of facet dislocations may be estimated using the formulae Ftx = 107.1 lbs/cm (x) unilateral, and Ftx = 76.4 lbs/cm (x) bilateral.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cervical Vertebrae
/
Joint Dislocations
Limits:
Adult
/
Humans
/
Male
Language:
En
Journal:
Spine (Phila Pa 1976)
Year:
1987
Document type:
Article