Sagittal alignment of the cervical spine after the laminoplasty

Kyung Soo Suk, Ki Tack Kim, Jung Hee Lee, Sang Hun Lee, Yang Jin Lim, Jin Soo Kim

Research output: Contribution to journalArticle

Abstract

STUDY DESIGN. Prospective study. OBJECTIVE. To identify the impact of laminoplasty on range of motion (ROM) and sagittal alignment of the cervical spine. SUMMARY OF BACKGROUND DATA. Cervical laminoplasty is an effective procedure decompressing multilevel spinal cord compression. Preoperative lordosis of the cervical spine is a prerequisite for laminoplasty, and maintaining postoperative lordosis is also important for decompression of the spinal cord. MATERIALS AND METHODS. Eighty-five patients who planned open door laminoplasty from C3-C7 were studied. Preoperative diagnosis included myelopathy cases associated with cervical spondylosis in 52, ossification of posterior longitudinal ligament in 29, and multilevel disc herniation in 4 cases. Cervical spine lateral radiography in neutral, flexion, and extension were taken before surgery and at 2-year follow-up. The cervical lordosis or kyphosis was measured by the Cobb's method. Diagnosis, degree of preoperative lordosis in the neutral position, and degree of preoperative sagittal alignment in flexion and extension were studied as risk factors for postoperative kyphosis. RESULTS. ROM was decreased 30.5% after laminoplasty. The mean preoperative lordosis in the neutral position was 16.2° and postoperative lordosis was 11.4°. Kyphosis (mean, 12.2°) was observed in 9 patients (10.6%) after surgery. All of them had been diagnosed as myelopathy cases associated with cervical spondylosis. The preoperative lordotic angle was significantly smaller in the kyphotic group than in the lordotic group. In the kyphotic group, preoperative flexion was 10.2° larger and extension was 10.3° smaller than in the lordotic group. The kyphotic group showed 19.3° of kyphosis in flexion and 8.7° of lordosis in extension before surgery. CONCLUSION. ROM of the cervical spine decreased by 30.5% after laminoplasty. Kyphosis was developed in 10.6% of the patients. The preoperative factors affecting postoperative kyphosis are diagnosis of myelopathy cases associated with cervical spondylosis, a lordosis angle of <10°, and a kyphotic angle during flexion that is larger than a lordotic angle during extension.

Original languageEnglish (US)
JournalSpine
Volume32
Issue number23
DOIs
StatePublished - Nov 1 2007
Externally publishedYes

Fingerprint

Lordosis
Kyphosis
Spine
Spondylosis
Spinal Cord Diseases
Articular Range of Motion
Ossification of Posterior Longitudinal Ligament
Spinal Cord Compression
Laminoplasty
Decompression
Radiography
Spinal Cord
Prospective Studies

Keywords

  • Cervical spine
  • Kyphosis
  • Laminoplasty
  • Range of motion

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Clinical Neurology

Cite this

Sagittal alignment of the cervical spine after the laminoplasty. / Suk, Kyung Soo; Kim, Ki Tack; Lee, Jung Hee; Lee, Sang Hun; Lim, Yang Jin; Kim, Jin Soo.

In: Spine, Vol. 32, No. 23, 01.11.2007.

Research output: Contribution to journalArticle

Suk, Kyung Soo ; Kim, Ki Tack ; Lee, Jung Hee ; Lee, Sang Hun ; Lim, Yang Jin ; Kim, Jin Soo. / Sagittal alignment of the cervical spine after the laminoplasty. In: Spine. 2007 ; Vol. 32, No. 23.
@article{b479afdc571e4791b3bebe3f54026ce7,
title = "Sagittal alignment of the cervical spine after the laminoplasty",
abstract = "STUDY DESIGN. Prospective study. OBJECTIVE. To identify the impact of laminoplasty on range of motion (ROM) and sagittal alignment of the cervical spine. SUMMARY OF BACKGROUND DATA. Cervical laminoplasty is an effective procedure decompressing multilevel spinal cord compression. Preoperative lordosis of the cervical spine is a prerequisite for laminoplasty, and maintaining postoperative lordosis is also important for decompression of the spinal cord. MATERIALS AND METHODS. Eighty-five patients who planned open door laminoplasty from C3-C7 were studied. Preoperative diagnosis included myelopathy cases associated with cervical spondylosis in 52, ossification of posterior longitudinal ligament in 29, and multilevel disc herniation in 4 cases. Cervical spine lateral radiography in neutral, flexion, and extension were taken before surgery and at 2-year follow-up. The cervical lordosis or kyphosis was measured by the Cobb's method. Diagnosis, degree of preoperative lordosis in the neutral position, and degree of preoperative sagittal alignment in flexion and extension were studied as risk factors for postoperative kyphosis. RESULTS. ROM was decreased 30.5{\%} after laminoplasty. The mean preoperative lordosis in the neutral position was 16.2° and postoperative lordosis was 11.4°. Kyphosis (mean, 12.2°) was observed in 9 patients (10.6{\%}) after surgery. All of them had been diagnosed as myelopathy cases associated with cervical spondylosis. The preoperative lordotic angle was significantly smaller in the kyphotic group than in the lordotic group. In the kyphotic group, preoperative flexion was 10.2° larger and extension was 10.3° smaller than in the lordotic group. The kyphotic group showed 19.3° of kyphosis in flexion and 8.7° of lordosis in extension before surgery. CONCLUSION. ROM of the cervical spine decreased by 30.5{\%} after laminoplasty. Kyphosis was developed in 10.6{\%} of the patients. The preoperative factors affecting postoperative kyphosis are diagnosis of myelopathy cases associated with cervical spondylosis, a lordosis angle of <10°, and a kyphotic angle during flexion that is larger than a lordotic angle during extension.",
keywords = "Cervical spine, Kyphosis, Laminoplasty, Range of motion",
author = "Suk, {Kyung Soo} and Kim, {Ki Tack} and Lee, {Jung Hee} and Lee, {Sang Hun} and Lim, {Yang Jin} and Kim, {Jin Soo}",
year = "2007",
month = "11",
day = "1",
doi = "10.1097/BRS.0b013e318158c573",
language = "English (US)",
volume = "32",
journal = "Spine",
issn = "0362-2436",
publisher = "Lippincott Williams and Wilkins",
number = "23",

}

TY - JOUR

T1 - Sagittal alignment of the cervical spine after the laminoplasty

AU - Suk, Kyung Soo

AU - Kim, Ki Tack

AU - Lee, Jung Hee

AU - Lee, Sang Hun

AU - Lim, Yang Jin

AU - Kim, Jin Soo

PY - 2007/11/1

Y1 - 2007/11/1

N2 - STUDY DESIGN. Prospective study. OBJECTIVE. To identify the impact of laminoplasty on range of motion (ROM) and sagittal alignment of the cervical spine. SUMMARY OF BACKGROUND DATA. Cervical laminoplasty is an effective procedure decompressing multilevel spinal cord compression. Preoperative lordosis of the cervical spine is a prerequisite for laminoplasty, and maintaining postoperative lordosis is also important for decompression of the spinal cord. MATERIALS AND METHODS. Eighty-five patients who planned open door laminoplasty from C3-C7 were studied. Preoperative diagnosis included myelopathy cases associated with cervical spondylosis in 52, ossification of posterior longitudinal ligament in 29, and multilevel disc herniation in 4 cases. Cervical spine lateral radiography in neutral, flexion, and extension were taken before surgery and at 2-year follow-up. The cervical lordosis or kyphosis was measured by the Cobb's method. Diagnosis, degree of preoperative lordosis in the neutral position, and degree of preoperative sagittal alignment in flexion and extension were studied as risk factors for postoperative kyphosis. RESULTS. ROM was decreased 30.5% after laminoplasty. The mean preoperative lordosis in the neutral position was 16.2° and postoperative lordosis was 11.4°. Kyphosis (mean, 12.2°) was observed in 9 patients (10.6%) after surgery. All of them had been diagnosed as myelopathy cases associated with cervical spondylosis. The preoperative lordotic angle was significantly smaller in the kyphotic group than in the lordotic group. In the kyphotic group, preoperative flexion was 10.2° larger and extension was 10.3° smaller than in the lordotic group. The kyphotic group showed 19.3° of kyphosis in flexion and 8.7° of lordosis in extension before surgery. CONCLUSION. ROM of the cervical spine decreased by 30.5% after laminoplasty. Kyphosis was developed in 10.6% of the patients. The preoperative factors affecting postoperative kyphosis are diagnosis of myelopathy cases associated with cervical spondylosis, a lordosis angle of <10°, and a kyphotic angle during flexion that is larger than a lordotic angle during extension.

AB - STUDY DESIGN. Prospective study. OBJECTIVE. To identify the impact of laminoplasty on range of motion (ROM) and sagittal alignment of the cervical spine. SUMMARY OF BACKGROUND DATA. Cervical laminoplasty is an effective procedure decompressing multilevel spinal cord compression. Preoperative lordosis of the cervical spine is a prerequisite for laminoplasty, and maintaining postoperative lordosis is also important for decompression of the spinal cord. MATERIALS AND METHODS. Eighty-five patients who planned open door laminoplasty from C3-C7 were studied. Preoperative diagnosis included myelopathy cases associated with cervical spondylosis in 52, ossification of posterior longitudinal ligament in 29, and multilevel disc herniation in 4 cases. Cervical spine lateral radiography in neutral, flexion, and extension were taken before surgery and at 2-year follow-up. The cervical lordosis or kyphosis was measured by the Cobb's method. Diagnosis, degree of preoperative lordosis in the neutral position, and degree of preoperative sagittal alignment in flexion and extension were studied as risk factors for postoperative kyphosis. RESULTS. ROM was decreased 30.5% after laminoplasty. The mean preoperative lordosis in the neutral position was 16.2° and postoperative lordosis was 11.4°. Kyphosis (mean, 12.2°) was observed in 9 patients (10.6%) after surgery. All of them had been diagnosed as myelopathy cases associated with cervical spondylosis. The preoperative lordotic angle was significantly smaller in the kyphotic group than in the lordotic group. In the kyphotic group, preoperative flexion was 10.2° larger and extension was 10.3° smaller than in the lordotic group. The kyphotic group showed 19.3° of kyphosis in flexion and 8.7° of lordosis in extension before surgery. CONCLUSION. ROM of the cervical spine decreased by 30.5% after laminoplasty. Kyphosis was developed in 10.6% of the patients. The preoperative factors affecting postoperative kyphosis are diagnosis of myelopathy cases associated with cervical spondylosis, a lordosis angle of <10°, and a kyphotic angle during flexion that is larger than a lordotic angle during extension.

KW - Cervical spine

KW - Kyphosis

KW - Laminoplasty

KW - Range of motion

UR - http://www.scopus.com/inward/record.url?scp=35848940467&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35848940467&partnerID=8YFLogxK

U2 - 10.1097/BRS.0b013e318158c573

DO - 10.1097/BRS.0b013e318158c573

M3 - Article

C2 - 17978640

AN - SCOPUS:35848940467

VL - 32

JO - Spine

JF - Spine

SN - 0362-2436

IS - 23

ER -