Comparison of enlargement of the spinal canal after cervical laminoplasty: open-door type and double-door type

The purpose of this study was to compare the degree of enlargement of the spinal canal between two methods of cervical laminoplasty (open-door laminoplasty and double-door laminoplasty) and to determine their appropriate surgical indications based on the results. Tension-band laminoplasty (TBL, one...

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Bibliographic Details
Published in:European spine journal 2010-10, Vol.19 (10), p.1690-1694
Main Authors: Hirabayashi, Shigeru, Yamada, Hironobu, Motosuneya, Takao, Watanabe, Yoshinobu, Miura, Makoto, Sakai, Hiroya, Matsushita, Takashi
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Cervical Vertebrae - diagnostic imaging
Cervical Vertebrae - pathology
Cervical Vertebrae - surgery
Female
Humans
Laminectomy - instrumentation
Laminectomy - methods
Male
Medicine
Medicine & Public Health
Middle Aged
Neurosurgery
Original
Original Article
Radiography
Spinal Canal - diagnostic imaging
Spinal Canal - pathology
Spinal Canal - surgery
Spinal Cord Compression - diagnostic imaging
Spinal Cord Compression - pathology
Spinal Cord Compression - surgery
Spinal Stenosis - diagnostic imaging
Spinal Stenosis - pathology
Spinal Stenosis - surgery
Spondylosis - diagnostic imaging
Spondylosis - pathology
Spondylosis - surgery
Surgical Orthopedics
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Summary:The purpose of this study was to compare the degree of enlargement of the spinal canal between two methods of cervical laminoplasty (open-door laminoplasty and double-door laminoplasty) and to determine their appropriate surgical indications based on the results. Tension-band laminoplasty (TBL, one method of open-door type) was performed in 33 patients and double-door laminoplasty (DDL) in 20 patients. The operation level ranged from C2 to C7 in all patients. The width of the spinal canal and the inclination angle of the lamina at the C5 and C6 levels were measured using a computer software program (Image J) and pre- and postoperative CT films. Concerning the degree of enlargement of the spinal canal, the mean expansion ratio at the C5 level was 148.9% in TBL and 148.2% in DDL, and there was no significant difference between them. However, at the C6 level, it was 159.0% in TBL and 140.3% in DDL, which was significantly larger in TBL than DDL ( p  
ISSN:0940-6719
1432-0932
DOI:10.1007/s00586-010-1369-y