Morphometric Analysis for Surgical Treatment of Cervical Discopathy by Posterior Laminoforaminotomy: Radiologic Study and Technical Note.
Cervical spine
Facetectomy
Foraminal stenosis
Keyhole
Laminoforaminotomy
Posterior approach
Journal
World neurosurgery
ISSN: 1878-8769
Titre abrégé: World Neurosurg
Pays: United States
ID NLM: 101528275
Informations de publication
Date de publication:
Feb 2019
Feb 2019
Historique:
received:
15
09
2018
revised:
08
10
2018
accepted:
09
10
2018
pubmed:
23
10
2018
medline:
23
2
2019
entrez:
23
10
2018
Statut:
ppublish
Résumé
The main concern with the posterior approach is the risk of postoperative segmental instability. The most commonly cited rule is that removal of the medial half of the articular facet provides adequate surgical exposure and has no effect on stability. The aim of this study was to define the areas of the articular processes in the cervical spine that can be safely removed. Computed tomography scans of 50 cervical spines were analyzed. Measurements were analyzed for bone removal assuming the standard technique of posterior laminoforaminotomy. The width of the facet was measured at the level of the widest dimension. The height of the articular process was taken from the bottom (in the case of inferior process) or top (in the case of superior process) of the process. The mean width of the articular process ranged from 11.8 ± 1.5 mm (range, 8.3-15.7 mm) at the C2-C3 level to 14.6 ± 1.7 mm at the C6-C7 level. At the cervicothoracic junction (C7-T1 level), the mean width decreased to 14.0 ± 1.7 mm. The mean value for both sides when the inferior articular process was measured at all levels was 5.0 ± 1.4 mm (range, 4.5-5.8 mm). The mean height of the superior articular process was 7.7 ± 1.5 mm (range, 6.8-8.3 mm). Based on our findings, our "5-5-7 mm rule" corresponds to the amount of bone removal for each step of the laminoforaminotomy.
Sections du résumé
BACKGROUND
BACKGROUND
The main concern with the posterior approach is the risk of postoperative segmental instability. The most commonly cited rule is that removal of the medial half of the articular facet provides adequate surgical exposure and has no effect on stability. The aim of this study was to define the areas of the articular processes in the cervical spine that can be safely removed.
METHODS
METHODS
Computed tomography scans of 50 cervical spines were analyzed. Measurements were analyzed for bone removal assuming the standard technique of posterior laminoforaminotomy. The width of the facet was measured at the level of the widest dimension. The height of the articular process was taken from the bottom (in the case of inferior process) or top (in the case of superior process) of the process.
RESULTS
RESULTS
The mean width of the articular process ranged from 11.8 ± 1.5 mm (range, 8.3-15.7 mm) at the C2-C3 level to 14.6 ± 1.7 mm at the C6-C7 level. At the cervicothoracic junction (C7-T1 level), the mean width decreased to 14.0 ± 1.7 mm. The mean value for both sides when the inferior articular process was measured at all levels was 5.0 ± 1.4 mm (range, 4.5-5.8 mm). The mean height of the superior articular process was 7.7 ± 1.5 mm (range, 6.8-8.3 mm).
CONCLUSIONS
CONCLUSIONS
Based on our findings, our "5-5-7 mm rule" corresponds to the amount of bone removal for each step of the laminoforaminotomy.
Identifiants
pubmed: 30347299
pii: S1878-8750(18)32367-2
doi: 10.1016/j.wneu.2018.10.070
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
e455-e460Informations de copyright
Copyright © 2018. Published by Elsevier Inc.