Differences in Biomechanical Factors for Fusion Transition Syndrome of Lumbar Spine between Pedicle Screw Fixation and Posterior Lumbar Interbody Fusion Groups
Journal of Korean Neurosurgical Society
;
: 252-258, 2003.
Article
in Korean
| WPRIM
| ID: wpr-116486
ABSTRACT
OBJECTIVE:
We present the investigation of the biomechanical factors of the degeneration process after lumbar fusion.METHODS:
Thirty-five patients underwent L4-5 fusion operation. We measured radius(cm), top angle(TA)(degree), and flexion-extension angle(FEA) at L3-4 joint in pedicle screw fixation(PSF)(n=27) and posterior lumbar interbody fusion(PLIF)(n=8)groups. They were divided into early(3 to 6 months) and late(over 1 year) groups according to post-operative period.RESULTS:
The pre-operative radius, TA and FEA in PSF were 6.2+/-0.4, 9.0+/-0.8, and 8.2+/-0.8. The early and late post-operative radius, TA and FEA in PSF were 6.4+/-0.5, 6.9+/-0.8, 6.8+/-0.8, and 5.5+/-0.7, 12.1+/-0.9, 11.0+/-0.9, respectively. The pre-operative radius, TA and FEA in PLIF were 5.4+/-0.5, 8.9+/-0.8, and 9.5+/-1.2. The early and late post-operative Radius, TA and FEA in PLIF were 5.0+/-0.4, 5.8+/-0.9, 5.2+/-0.7, and 5.0+/-0.5, 8.4+/-0.9, 7.6+/-0.8, respectively. In late PSF, TA and FEA were significantly increased(p<0.05)but radius was significantly decreased (p<0.05) compared with pre-operative ones. But in late PLIF, all the factors were decreased compared with pre-operative ones.CONCLUSION:
Biomechanical factors of chronic complications were different between PSF and PLIF. Increased FEA seems to be an important factor for post-operative degeneration in PSF, whereas increased stiffness and stress seems more important in PLIF.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Radius
/
Spine
/
Joints
Limits:
Humans
Language:
Korean
Journal:
Journal of Korean Neurosurgical Society
Year:
2003
Type:
Article
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