Is the Cross-sectional Area after Unilateral Open Door Laminoplasty Wider than that after Midline Splitting Laminoplasty ? : Mathematical Approach
Korean Journal of Spine
;
: 237-241, 2013.
Article
Dans Anglais
| WPRIM
| ID: wpr-219675
ABSTRACT
OBJECTIVE:
The aim of this study was to compare geometrically cross-sectional areas of two different laminoplasty techniques in same opening size. Some investigators have studied the expanded areas of the two different techniques using imaging study. Although it is unclear that postoperative spinal canal is correlated with the surgical outcome we just focused on mathematical and geometrical correlation of the expandable area with surgical opening size in different laminoplasty techniques.METHODS:
To predict the expandable area by a midline splitting technique and a unilateral open door technique, we placed an imaginary isosceles triangle in the spinal canal and drew graphs for the equation of the expandable areas in same opening size using the Pythagorean theorem and mathematical program. To substitute the constant figures of mathematical formula we estimated the normal cervical spine CT scans of 50 Korean adults.RESULTS:
We subtracted the imaginary triangle from the spinal canal and were left with the remaining area of the spinal canal that was not changed before and after surgery. In same opening size the expandable area by the midline splitting technique was same but slightly wider than the unilateral open door technique, irrespective of the triangular shape. For a normal isosceles triangle the results were the same.CONCLUSION:
Using mathematical proof, the expandable area after the midline splitting technique was same but slightly larger than that after the unilateral open door technique, irrespective of the size of the lamina opening.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Personnel de recherche
/
Canal vertébral
/
Syndrome de compression médullaire
/
Ostéophytose vertébrale
/
Rachis
/
Tomodensitométrie
/
Vertèbres cervicales
/
Ossification du ligament longitudinal postérieur
Type d'étude:
Étude de prévalence
/
Étude pronostique
/
Facteurs de risque
Limites du sujet:
Adulte
/
Femelle
/
Humains
langue:
Anglais
Texte intégral:
Korean Journal of Spine
Année:
2013
Type:
Article
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